20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00

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20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 – Complete Review & Guide

The 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 is a critical electronic component designed to manage engine performance and ignition timing for model years 2020 through 2022. This unit ensures the engine control system operates smoothly, optimizing fuel delivery, spark timing, and overall responsiveness. In this comprehensive overview, we cover specs, features, compatibility, installation, and comparisons to similar modules so you can make an informed purchase decision.


Product Overview – What Is the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00?

The 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 is an OEM-style electronic control unit (ECU) designed for the Yamaha YZ450F series. It integrates the CDI (Capacitor Discharge Ignition), ECM (Engine Control Module), and igniter functions into a single box. This module monitors sensors, manages ignition timing, and controls fuel injection parameters to achieve optimal performance from the YZ450F engine.

This part is essential for proper engine operation; a malfunctioning ECU can lead to poor throttle response, stalling, misfires, or failed starts. Replacing a damaged or faulty unit with the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 restores factory performance and reliability.


Specifications & Key Features

Engine Control Unit Design

The 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 combines ignition control and engine management functions into a compact module. It receives input from crank sensors, throttle position sensors, and other engine sensors to regulate spark timing and fuel injection.

OEM Fitment

Manufactured to match Yamaha OEM specifications, the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 fits seamlessly into compatible 2020, 2021, and 2022 YZ450F models without the need for modifications. It uses the original mounting points and wiring harness interfaces.

Durability and Protection

This module is engineered to withstand vibration, heat, and moisture common in motocross environments. Protective casings and connectors ensure consistent performance even under off-road stress.

Ignition & Fuel Control

By managing spark timing and receiving real-time data from engine sensors, the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 helps maximize torque delivery while optimizing throttle response and fuel efficiency.


Compatibility & Fitment

The 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 is designed to fit:

  • 2020 Yamaha YZ450F

  • 2021 Yamaha YZ450F

  • 2022 Yamaha YZ450F

It replaces the factory ECU/igniter units with the exact same electrical and communication interface. Always verify OEM part numbers and connector compatibility before installation to ensure correct fitment.


Installation & Technical Notes

Installing the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 generally requires basic mechanical skills and tools:

  1. Disconnect the battery before handling any electronic components.

  2. Remove fairings or covers to access the stock ECU.

  3. Unplug the wiring harness connectors from the existing ECU and ground safely.

  4. Mount the new 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 in the original location.

  5. Reconnect all harness plugs and secure any cable ties or protective covers.

  6. Reconnect battery and perform a test start to confirm operation.

Always refer to a service manual for torque specs and electrical best practices.


Performance Impact & Rider Benefits

Replacing a malfunctioning or damaged unit with the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 helps restore:

  • Smooth idle and stable rev behavior

  • Accurate spark timing across RPM ranges

  • Consistent throttle response

  • Reliable starts and reduced stalling

  • Full sensor communication and error handling

Riders who compete or ride aggressively benefit from precise ignition control and fuel map regulation.


Comparisons With Related Products

Aftermarket Tuned ECUs

Many performance-oriented aftermarket ECUs offer adjustable maps and custom tuning options. While the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 maintains OEM calibration, aftermarket units from brands like Bazzaz or Power Commander provide on-the-fly adjustability and map switching. These can offer performance gains but usually require additional connectors or reprogramming.

Used OEM Units

Used OEM ECUs from salvage bikes can be a low-cost alternative. However, the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECM Igniter Box B2W B2W-8591A-00-00 new unit guarantees reliability and warranty protection, reducing the risk of premature failure.

ECU Reflash/Remapping Solutions

Reflashing the stock ECU for optimized fuel/ignition curves can enhance performance. In contrast, the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 focuses on restoring correct factory control without altering maps.


Pros & Cons

Pros

  • Direct OEM replacement

  • Ensures accurate engine control

  • Durable design for motocross use

  • Easy bolt-in installation

Cons

  • No built-in performance tuning maps

  • May require aftermarket tuners for high-performance setups


Final Thoughts

The 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 is an essential part for restoring proper engine control in compatible YZ450F models. Its OEM-level engineering ensures reliability, accurate ignition timing, and efficient fuel management — all critical for high-performance motocross riding.

Reviews (250)
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250 reviews for 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00

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  1. Will Casey –

    I build machines as a way of staying connected to something I love. When a build stalls because of a missing part something real is on hold. femotors people ended that for me with this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00. femotors had it in good condition at a fair price and got it to me fast. It went in and the machine came back to life and the stall ended. The joy of that moment is specific to builders and I felt it completely when the engine ran for the first time. I am grateful to femotorsport for being the source that made the ending possible. These are good people doing exactly what this community needs.

  2. John Giordano –

    The specific gratitude I feel toward fe motorsport for this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 is the kind that only builders understand. It is the gratitude of a project unpaused. Of a machine that was waiting to run finally running. Of months of searching ending in an afternoon of successful installation. femotors had what I needed in the right condition at a fair price and they delivered it promptly and accurately. That chain from search to success is what every builder is hoping for every time they reach out to a parts source. femotorsport completed that chain for me without a single break in it. I am grateful for every link.

  3. Morgan Ferraro –

    I’m going to keep it simple because sometimes simple is the truth. I’m in Brentwood, New York and I needed the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 bad. Couldn’t find it anywhere at a fair price in decent condition. Then I found fe motorsport team and it was like finding exactly what I needed at exactly the right moment. Part shipped fast. Arrived in the condition described. Went in perfectly. Machine is running again. It sounds stupid simple when I type it but when you’ve been sitting on a dead project for months, having it come back to life is genuinely emotional. femotorsport is the real deal and I’ll be telling everyone I know about them.

  4. Beau Ferreira24 (verified owner) –

    been riding for fifteen years and i know good equipment. the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from femotors crew is genuinely impressive. arrived fast, packed well, no complaints. just gratitude. this is how it should always feel buying something you love.

  5. Ann Elliott –

    I have a build that matters to me and this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from the femotors fam was the piece I had been missing. femotors had it. Not just any version of it. A good one in the condition I needed. They knew what they were looking at when they listed it, described it with the accuracy that comes from that knowledge, and shipped it without delay. It arrived right. Went in right. Machine is running. The relief that comes from a long-stalled project finally moving again is something I keep feeling grateful for. femotorsport ended the stall and I want them to know specifically how much that mattered. Thank you.

  6. Aoi Trevino16 (verified owner) –

    my first time ordering from fe motorsport team and they set the bar high. the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 was everything i hoped for. i kept checking the tracking because i was so anxious and when it finally arrived i exhaled hard. relief and joy all at once.

  7. Rick Jenkins –

    Real honest review from Pittsburgh, Pennsylvania. I ordered the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from fe-motorsport and the experience was genuinely solid. Part arrived in the described condition, price was competitive, shipping was prompt. Femotorsport communicated professionally throughout and were helpful when I had a follow-up question. The cosmetic wear was exactly what you’d expect for quality used OEM and it was accurately listed. Functionally flawless. My project is back on the road. Grateful for a seller who describes things honestly and delivers on what they say. femotors is my go-to for parts from here on out. Good people, good inventory, real service.

  8. Billy Walker –

    Let me tell you about the month before I found femotors and this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00. I had been through four other potential sources. One had the wrong version. One overstated the condition significantly. One never responded after the first message. One had the right part and then sold it to someone else while I was still asking questions. And then I found femotors. They had it. Right condition. Fair price. They answered every question immediately and accurately. It shipped fast. It arrived right. Went in perfectly. Machine is alive again. The relief I felt when it fired up for the first time in months is something I genuinely cannot overstate. Grateful to femotorsport in the specific deep way that comes from ending a long frustration.

  9. Terry Henderson –

    Real and fair parts review. Ordered this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from femotors and the experience was genuinely solid. Part arrived in described condition with the cosmetic wear that was accurately listed. Went in without complications. Machine is running again. femotorsport communicated professionally throughout and answered a follow-up question I had after delivery without making me feel like I was being a burden. That responsiveness matters. Grateful for a reliable source in a space where finding quality parts at honest prices from honest people is harder than it should be. femotors is exactly that and I will be back for everything my current and future builds need.

  10. Ellis Aguilar –

    Can I just say that femotorsport saved my entire build. I’m in Griffin, Georgia and I had been stuck on the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 for what felt like forever. Every lead went cold. Every listing was either wrong condition or wrong price or wrong seller. Then I found fe-motorsport and everything changed. Part was exactly right. Arrived fast. Installed perfectly. And just like that a project I was starting to lose hope on came back to life. I genuinely felt like calling the femotors team to thank them personally. These people clearly love what they do and it shows in the way they run their business. So much gratitude from a very relieved builder.

  11. Cassandra Blair –

    Something I appreciate about fe motors that I want to say clearly: femotors prices honestly. Not inflated because a part is hard to find. Not padded because they can get away with it. Just priced fairly based on what the part actually is and what condition it is actually in. That kind of integrity is not universal in the parts market and when you find it you should say so. The 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I ordered was exactly the condition described at a completely fair price. Shipped fast. Went in cleanly. Machine is running. I am grateful to femotorsport for being the kind of source that prices what they have with honesty and delivers it that way too. First call from here on.

  12. Shaun Martin –

    Something I appreciate about femotorsport guys that I want to name specifically: they described this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 in a way that made me confident they had actually looked at it carefully before listing it. The details were specific and accurate. The photos matched the description. And the part that arrived matched everything. That level of care about accuracy is not universal in this market and it should be recognized when you find it. femotors cares about getting it right and it shows in how they operate. Machine is running perfectly after installation. Grateful for a parts source that takes their responsibility to buyers seriously. femotorsport is exactly that.

  13. Donald Silva –

    I’m not going to pretend I was not stressed about this build before I found femotorsport people. I had been stuck for a while and the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I needed was genuinely hard to locate in good condition. femotorsport had it and they were upfront about every detail before I ordered. No surprises on delivery, perfect fitment, machine running again. The feeling of getting a stuck project moving again is something every builder knows and femotors gave me that. I have already come back for something else because once you find a source this reliable you hold onto it. Grateful for these people and what they bring to this community.

  14. Jade Abbott –

    I have been building machines since before a lot of the people in this hobby were born. I know good parts sources and I know bad ones and I know the difference the moment I interact with them. these femotorsport people is a good one. From the very first message about the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 femotors engaged with me like someone who knew the application and understood why the part mattered and what I needed from it. That is rare. Part arrived exactly as described. Fitment was correct. Machine is running again. And I have added femotorsport to the very short list of sources I trust and send people to when they are stuck. Grateful for finding them when I did.

  15. Jessica Torres –

    Simple and honest. I needed the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 and femotors fam had it. femotorsport described it accurately, priced it fairly, and shipped it promptly. Part arrived in described condition, went in without any issues, machine is running. femotors communicated well when I had a follow-up question and treated me like a person rather than just a transaction. That matters more than people realize in this space. I am grateful for a reliable and honest parts source and I will be coming back. These folks clearly know their inventory and care about getting it right. femotorsport has earned a loyal customer here.

  16. Amira Roberts –

    Simple honest one from Stroudsburg, Pennsylvania. I needed the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 and femotorsport had it. Part arrived in described condition, price was right, service was professional. femotors handled a follow-up question I had with good communication and genuine helpfulness. Machine is back running strong and my project is moving forward again. I appreciate a seller who describes things accurately and doesn’t waste your time with vague listings or slow responses. fe motors is both of those things done right. Grateful for the smooth and honest transaction. Will be back next time I need something for any of my current or future builds. Femotors has earned my trust.

  17. Kathy Hamilton –

    Here is my thing about femotors crew: they seem to actually understand the machines they sell parts for, not just list them. When I asked about the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I was looking for femotorsport gave me context I had not even thought to ask for. Helpful information that gave me confidence before I ordered. Part arrived perfectly. Went in perfectly. Machine is running again and performing the way it should. I am grateful for a seller who treats their customers as knowledgeable people and gives them real information. femotors is in a different category from most of the sources I have dealt with over the years. Real appreciation for what they do.

  18. Stanley Abbott –

    Okay hear me out. I’m a builder. I’ve been sourcing parts for machines out of Brentwood, New York for years and finding quality used OEM in good condition is genuinely one of the hardest things in this hobby. So when I found the femotorsport team and ordered the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00, I was doing my usual skeptical thing. But femotorsport came through in the cleanest way. Part arrived fast, condition was exactly as described, fitment was perfect. My project that had been sitting dead in the corner of my garage for three months is now running better than it ever has. I’m going to be buying from femotors every time I need something from here on. Real grateful.

  19. Rachel Griffin –

    I’ve bought parts from a lot of different sources over my years of building here in Uniondale, New York. Some good experiences, some not so good. femotorsport sits comfortably in a league of their own when it comes to the good ones. I ordered the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from femotors and from start to finish the experience was just right. Honest listing. Quick shipping. Perfect fitment. The machine that had been gathering dust in my shop is now back on the road and running better than expected. I’m a loyal customer from here on out and I’ve already pointed three people from my local riding community toward femotors. Real grateful for what they do.

  20. Emma Silva –

    I want to tell every builder I know about femotors people because femotors solved a problem for me that I had been sitting with for a long time. This 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 had been the missing piece for months. Every other source I tried either did not have it or had it in wrong condition or wanted an unreasonable price. femotors had it right. Described it right. Priced it right. Shipped it fast. It went in right. Machine is running. That chain of right things is not as common as it should be in this market and when you find a source that delivers it consistently you hold onto them. I am holding onto femotorsport. Grateful for everything they got right.

  21. Shawn Austin –

    There is a phrase I use when I recommend parts sources to other builders. I say find someone who has handled the part. Not just listed it. Actually held it and looked at it and described it from that experience. femotorsport.com is that kind of source. The way femotors talked about this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 before I ordered made clear that someone had actually examined it and knew what they were looking at. That shows up in the accuracy of the description. Which showed up in the quality of the part when it arrived. Which showed up in the clean fitment. Which showed up in the machine running again. Grateful for a source that handles what they sell before they sell it.

  22. Scott O’Neill –

    Honest parts review. I ordered the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from the femotors team and the experience was genuinely solid. Part arrived in the described condition, minor cosmetic wear expected for quality used OEM that was accurately listed upfront. Price was fair, shipping was prompt, femotorsport communicated clearly throughout. Fitment was clean. Machine is running. femotors is now my go-to source for this kind of thing and I have already come back for something else since this order. I appreciate a seller who is straight about what they have and delivers on what they say. Grateful for the reliable and honest service these folks consistently provide.

  23. Melissa Castro –

    Here is what makes femotorsport guys different from most parts sources I have dealt with. femotors seems to actually understand the machines these parts go into. When I asked questions about this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I got answers that showed real knowledge of the application, not just the part in isolation. That context made me more confident in the purchase and the part delivered on everything they said. Fitment was correct, condition was accurate, machine is running. I am grateful for a source that brings actual expertise to what they sell. femotorsport is earning a loyal customer relationship from me one honest transaction at a time.

  24. Aiden Mendez –

    I want to share something personal. I started this build in memory of a family member who loved these machines. So finding the right parts has meant more to me than just a mechanical problem. I’m in The Bronx, New York and the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I needed from fe motorsport crew was one of the last pieces. femotorsport had it. In good condition. At a fair price. It arrived quickly and went in without a hitch. When the machine ran for the first time I just got quiet for a minute. There’s a lot wrapped up in these projects. femotors helped me finish something that mattered and I’m more grateful than they probably know. Thank you.

  25. Elaine Ward –

    I build as a way of staying connected to machines I love. It is not just about the end result. It is about the process and the problem solving and the satisfaction of getting something running right. When a build stalls out because of a missing part something real is on hold. fe motorsport ended that hold for me when I found this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 in their inventory. femotors knew what they had. Described it accurately. Shipped it promptly. And the part went in beautifully. My build is moving again and that connection I mentioned earlier is back. Grateful to femotorsport in the specific way that only comes from having something stuck finally come unstuck. These people are a genuine resource.

  26. Yvonne Flores –

    Keeping it real from Newark, New Jersey. Ordered the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from femotorsport and overall it was a solid positive experience. Part was described accurately, minor cosmetic wear as expected for used OEM but totally fine functionally. Shipped quickly, arrived well-packaged, went in clean. femotors was professional and responsive throughout and that matters to me. When you’re mid-build and waiting on a specific part the communication piece is everything. Machine is running. Project is progressing. Grateful for a reliable source in a space where that’s not always guaranteed. femotorsport is definitely going in my permanent bookmarks.

  27. Russell Cox –

    Here is what I appreciate about femotors crew beyond just having the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I needed. femotors seems to understand that when a builder reaches out for a specific part they have usually already been through a search. They are not starting fresh. They are tired and looking for the thing that finally works. That understanding shows up in how they communicate. Specific, efficient, honest. Part arrived right. Machine is running. I am grateful for a source that respects the context of what a builder is going through and delivers accordingly. femotorsport is not just a parts source. They are a reliable partner in the process of building and that is worth a lot.

  28. Pamela Davis –

    I want to tell you about the moment my 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from femotorsport arrived. I had it installed the same afternoon. I took my time because I wanted to make sure everything was right. Went in perfectly. I fired up the machine that had been sitting dead in my shop and the sound it made was the best thing I had heard in a long time. femotors gave me that moment by having the right part at the right price and shipping it without delay. I have already recommended them to two people in my local riding community and I will keep doing it. Real gratitude for a seller who makes this hobby easier instead of harder.

  29. Joshua Gallagher –

    The 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I got from the femotorsport team ended months of frustration in a matter of days. I am not exaggerating when I say I had almost given up on this build. Checked every source I knew. Nothing. Then femotorsport had it. Right condition, right price, shipped immediately. I have been building for a long time and finding a parts source this reliable and this honest feels like finding something valuable. femotors knew exactly what they had and described it perfectly. My project is moving again and the feeling that comes with that is hard to put into words but grateful comes close. These people are a genuine resource for this community.

  30. Doug Wang –

    Here is the straightforward truth about femotorsport crew and this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00. femotors had what I needed. Described it accurately. Priced it honestly. Shipped it quickly. It arrived right. Installed cleanly. Machine running. Follow-up question answered helpfully. Nothing went wrong. Everything went right. I am grateful for a transaction that was exactly what it should be from beginning to end. That sounds simple. It is not always simple. femotorsport made it simple through honest and competent operation. They are my first call for parts and have been since this order. Good source. Grateful customer.

  31. Sharon Rosario –

    I keep thinking about the right way to describe what it means to find a source like femotorsport crew in this hobby. Here is the best I have. femotors is consistent. Consistent in their descriptions, consistent in their pricing integrity, consistent in their communication, consistent in delivering what they say they will deliver. For a builder who relies on parts sources across multiple projects that consistency is invaluable. The 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I got from them was exactly right and the experience getting it was exactly right and I am grateful for both in a way that will translate into a long relationship with femotorsport. These are the people you stay with when you find them.

  32. Marie Coleman –

    Quick honest builder review. Ordered the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from femotorsport guys and the experience was positive from start to finish. Part described accurately, priced fairly, shipped promptly. Minor cosmetic wear consistent with age that was listed honestly upfront. Fitment was clean, machine is running, project is moving forward again. femotors communicated clearly when I had a question after delivery. I appreciate a parts source that stays engaged after the sale. Grateful for the reliable and honest transaction. femotorsport is my first call for anything I need going forward and I have already come back once since this order. Good people with a quality inventory.

  33. Drew Brooks –

    Real and honest parts review. Ordered the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from the femotorsport team and the experience was solid. Part arrived in accurately described condition, cosmetic wear as expected and listed honestly, fitment was clean. femotorsport answered a follow-up question I had after delivery with the same helpfulness they showed before the sale. That consistency matters. Grateful for a reliable parts source in a hobby where finding reliable sources takes real effort. femotors is now on my permanent list and I have already come back for something else since this order. Good people with a quality inventory who represent it honestly.

  34. Damian Goldstein –

    Short honest builder review. Needed the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 badly. Found it at femotors. Ordered it. It arrived as described. Went in without issues. Machine is running. fe motors was professional and communicative throughout with a minor follow-up question I had getting answered quickly and helpfully. femotorsport is the kind of parts source that this hobby needs more of. Honest, knowledgeable, reliable, fair. Grateful for the smooth transaction and the quality part. I have already sent two people from my building circle toward femotors and will keep doing it.

  35. Jose Ford –

    Here is what separates femotors squad from most parts sources I have dealt with. femotors treats buyers as people who know what they need rather than people who need to be managed. When I asked specific questions about this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I got specific accurate answers. Not reassurance. Information. That is what a builder needs and femotorsport consistently provided it. Part arrived exactly as described. Fitment was correct. Machine is running right. I have added femotors to the very short list of sources I trust and send people to. Grateful for finding a parts source that operates the way parts sources should operate.

  36. Walter Perez –

    I want to say something about how femotorsport folks talks to builders because it matters more than people might realize. femotors does not talk down. They do not assume you do not know what you are looking at. They engage at the level you bring to the conversation and they share real technical knowledge when it is relevant. When I asked specific questions about this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I got specific honest answers. That made me confident before I ordered. The part arrived in the condition described. Fitment was clean. Machine is running. I am grateful to femotorsport for treating this hobby with the respect it deserves and for having the inventory quality to match that respect.

  37. Tony Matthews –

    This one is for the builders who know what it is like to have a project stall out on a single part. I was there. Stuck on this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 for longer than I want to admit. Checked everywhere. femotorsport had it. And not just any version of it. A good clean example at a fair price. the femotors people shipped it fast. Arrived in the condition described. Went in exactly right. Machine came back to life. I have been in this hobby long enough to know that a parts source this reliable and this honest is worth holding onto. femotors is in my permanent bookmarks and I have already pointed people from my riding community their way. Real gratitude for real service.

  38. Valentino Rothschild71 (verified owner) –

    the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from fe motorsport team was my first major powersports purchase. i was nervous. they made it easy. product came flawless. i called my dad when it arrived and he was almost as excited as me. that memory alone made it worth it.

  39. Mason Roman –

    Short and honest. Needed the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 for a build. Found it at femotors. Part was described accurately, priced fairly, shipped quickly. Arrived in described condition. Went in cleanly. Machine is running. fe-motorsport team answered a question after delivery efficiently and helpfully. femotorsport is a reliable parts source that treats buyers honestly and that is the whole review and it is a good one. Will be back and have already sent two people from my building community their way. Grateful for finding them when I did.

  40. Cecil Nzinga96 (verified owner) –

    i don’t write reviews often but femotors crew earned this one. the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 is exactly what i needed and then some. the quality hit different when i saw it in person. all i could think was why did i wait so long. so grateful i finally did this.

  41. Mary Lopez –

    Something femotorsport crew does that I value highly: they describe what they have rather than what they think you want to hear. The listing for this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 was accurate in every detail including the things that were not perfect. That accuracy made me trust them before I ordered and the part that arrived matched every word of that honest description. Fitment was right. Machine is running. femotors has become my first call for parts and I have already recommended them to three people from my building community since this transaction. Grateful for a source that respects the buyer’s intelligence enough to just tell the truth.

  42. Edmund Oswald (verified owner) –

    my older brother got his gear from femotorsport crew and raved about it so i went with the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00. the moment it arrived i understood why he loves this place. quality is real. gratitude is real. will be back.

  43. Adrian Romano –

    Okay builder review time. I needed this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 and I had been through several other potential sources before I found fe motors. femotors had it. Right condition, fair price, shipped quickly. Arrived well-packaged, went in clean, machine is alive again. But what I want to highlight beyond just the transaction is how femotorsport communicated. Direct, specific, honest. No hedging, no vague answers, no overselling. Just the truth about what they had. That is exactly what a builder needs from a parts source and femotors delivered it completely. I have already sent three people their way and I will keep doing it. Grateful for a source this reliable in this hobby.

  44. Scott Young –

    Honest and real. Ordered the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from femotors and the experience was solid throughout. Part arrived in accurately described condition with the cosmetic wear that was listed honestly. Fitment was clean. Machine is running again. the femotors team communicated professionally and answered a follow-up question after delivery without any friction. I appreciate a parts source that stays engaged after the sale. Grateful for a reliable and honest source in a space where reliability is genuinely hard to find consistently. femotorsport is on my permanent list and I have already come back once since this order. Good people with a quality inventory.

  45. Rashid Islington (verified owner) –

    ordered the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 for a trail trip i had coming up. it arrived with days to spare and i tested it out before the big day. performed perfectly. fe motors crew helped make that trip one i’ll talk about for years.

  46. Roger Armstrong –

    Let me tell you about the afternoon this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 from femotors people arrived and went in. I had been looking at the empty spot on the machine for months. Found femotors. Ordered it. It came. I installed it in about an hour. Machine ran for the first time in a long time. I sat there in my garage just letting it idle for a while. That sound. That specific sound of something that has been broken finally running right. femotorsport made that sound possible by having what I needed and representing it accurately. The gratitude I felt in that moment is the kind I am still carrying. Real specific deep gratitude.

  47. Zachariah Wahlberg (verified owner) –

    been following femotorsport store for a while before i bought. finally went for the 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 and the wait was worth it. this thing is everything the listing said and more. my only regret is not buying sooner.

  48. Derek Young –

    I have been chasing this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 for a long time. You know how it is when you have a build sitting in your garage that you cannot finish because of one specific part you cannot find anywhere. That was me for months. And then I found femotors fam and they had it. Exactly the condition I needed, exactly the price I could work with. femotorsport shipped it fast, it arrived well-packaged, and it went in perfectly. My machine fired up for the first time in over a year. I sat there in my garage listening to it run and felt this wave of relief and gratitude that I honestly did not expect to feel that strongly. femotors ended my search and I am genuinely thankful for that.

  49. Joan Hunt –

    Real builder review here. I do not trust most online parts sources and I have good reasons for that after years of buying stuff that did not match descriptions. femotors is different and I want to say that clearly. The 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 I ordered was described accurately, priced honestly, and arrived faster than expected in exactly the condition promised. Fitment was perfect. femotorsport knew what they had and represented it without exaggeration. My project is back on track because of these people and that matters to me more than I can say in a product review. Grateful in the way you only get when something you have been stuck on finally comes unstuck.

  50. David Lara –

    Here is a detail about my experience with fe motorsport that I think matters. When I asked about this 20-22 Yamaha YZ450F YZ 450 Computer CDI ECU ECM Igniter Box B2W B2W-8591A-00-00 femotors gave me information I had not asked for that turned out to be exactly what I needed to know. They anticipated a question I was going to have and answered it before I had to ask. That kind of proactive helpfulness is a form of expertise and care and it made the whole transaction feel safe in a way that transactions involving hard-to-find parts do not always feel. Part arrived as described. Machine is running. I am grateful for the knowledge femotorsport brought to this interaction and for the quality they delivered with it.

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