2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 – Complete Product Overview
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 is an essential OEM replacement part designed specifically for Honda Grom 125 motorcycles from model years 2017 through 2020. Whether you’re repairing a non-starting engine or performing a comprehensive rebuild, this high-quality starter motor and idler gear assembly offers reliable performance and precision fitment. In this detailed product review, we explore its features, compatibility, installation, comparisons with aftermarket alternatives, and why it’s preferred by riders and mechanics alike.
Product Overview – What Is the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901?
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 is a genuine Honda replacement assembly that includes the starter motor and the idler gear used in the starting system of Honda Grom 125 motorcycles. Built to original factory specifications, this unit ensures accurate fitment and smooth engagement with the engine’s crankshaft and starter drive.
This OEM starter motor and idler gear assembly is sold in a “LIKE NEW” condition, meaning it has minimal wear and operates at or near original performance levels. Honda part number 31200-KPW-901 corresponds to the starter motor assembly designed for Grom models from 2017, 2018, 2019, and 2020, making it an ideal choice for riders restoring or maintaining their bikes.
Key Features & Specifications
OEM Honda Quality
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 is manufactured to the exact same specifications as the original component installed at the factory. This results in a dependable fit and performance that aftermarket substitutes often struggle to match.
Precision-Engineered Starter Motor
This starter motor delivers consistent cranking power, ensuring quick and reliable starts across a range of temperatures and riding conditions. The integration of the starter and idler gear assembly reduces installation time and potential alignment issues.
Idler Gear Engagement
The idler gear in this assembly rotates smoothly and engages with the starter drive and crankshaft effectively. Proper engagement ensures minimal gear wear and helps prevent common starting issues such as grinding or slow cranking.
Like New Condition
The term “LIKE NEW” indicates that the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 has been inspected and tested to operate like new, even if it may have been previously installed or lightly used. This condition provides excellent value compared to brand new OEM units.
Why Choose This OEM Starter Assembly?
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 is preferred by many motorcycle owners for several reasons:
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Direct replacement fit: No modification or adaptation required for compatible Grom models.
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Reliable performance: Starts the engine smoothly, even after long periods of inactivity.
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Durability: Designed to Honda’s exact tolerances and materials standards.
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Cost-effective: Like new condition offers savings compared to a new OEM part.
These benefits make this starter motor and gear assembly a smart choice when addressing hard starts or starter system failures.
Installation & Compatibility
Installing the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 is straightforward for anyone familiar with basic motorcycle maintenance. Typically, you will:
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Remove the seat and side covers.
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Drain engine oil if required for access.
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Unbolt the old starter motor and idler gear assembly.
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Install the replacement part, ensuring proper engagement and torque specs.
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Reassemble components and test starting function.
This assembly is compatible specifically with Honda Grom 125 models produced from 2017 to 2020, which includes years 17, 18, 19, and 20.
Comparisons With Related Products
New OEM Starter Motor 31200-KPW-901
A brand new OEM starter motor identical to the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 provides the same performance but at a higher price point. The like-new option offers similar reliability at a lower cost, making it a better value for many riders.
Aftermarket Starter Motors
Aftermarket starter motors designed for Grom models are often less expensive, but they can vary significantly in materials, tolerances, and gear engagement quality. Riders choosing aftermarket units may experience inconsistent starts or faster wear. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 retains the advantage of Honda’s original engineering.
Rebuilt Starter Assemblies
Some rebuilt starter assemblies are available from third-party vendors. While affordable, these can suffer from variable rebuild quality. The OEM like-new part delivers predictable performance with Honda-standard fit and function.
Pros & Cons
Pros
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Reliable OEM performance
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Precise fitment for 2017–2020 Grom 125 models
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Smooth gear engagement and starting function
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Excellent value in like-new condition
Cons
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Limited to specific Grom model years
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Not a brand new component
Final Thoughts
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 stands out as a dependable, cost-effective replacement for riders experiencing starter issues on their Honda Grom 125. With genuine OEM quality, accurate fitment, and tested like-new performance, this assembly offers both peace of mind and long-term reliability.



















Greyson Nelson –
Decent used OEM part. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 arrived in the condition described and installed without issues. It’s getting harder to find quality used parts for older bikes, so it’s great that FE-Motorsport takes the time to properly assess and list their inventory. Would buy from them again.
Joseph Sanders –
Hunted for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 for months. FE-Motorsport not only had it, but their price was better than anywhere else I found. Arrived quickly and in great shape. Installed it the same day and the bike runs perfectly. These guys are a goldmine for OEM parts.
Anthony Anderson –
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 was exactly what I needed to get my project bike back on the trail. Arrived well-packaged, no damage, perfect condition. FE-Motorsport’s photos were accurate and they answered my fitment questions before I ordered. Smooth transaction, quality part.
Kevin Simmons –
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 exceeded my expectations for a used part. Clean, fully functional, and the fitment was exactly right. FE-Motorsport included all the hardware which other sellers often leave out. Fast shipping, professional packaging. Five stars without hesitation.
Aaron Morgan –
Ordered the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 and it arrived in excellent condition. Fitment was spot on and the performance improvement was immediate. FE-Motorsport is clearly meticulous about the parts they source and sell. Will be ordering more parts for my next build.
Bryan Marshall –
Good part, good price. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 did the job perfectly. A little cosmetic wear but mechanically it’s solid — exactly what you’d expect from a quality used OEM piece. FE-Motorsport communicated well and shipping was reasonably fast. Satisfied customer.
Anthony Allen –
Happy with the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901. Fits perfectly and the condition is great for a used OEM part. Small scuff on the casing but functionally flawless. FE-Motorsport shipped quickly and communication was good. Saved me a lot versus buying new.
Bella Gibson –
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 was a great find at a fair price. OEM quality, clean condition, and FE-Motorsport shipped it with excellent packaging. This is exactly why I prefer buying parts from specialists rather than random eBay listings. Trustworthy seller with quality inventory.
Aubrey Price –
Found the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 after weeks of searching elsewhere. FE-Motorsport had it in stock, the condition was as listed, and it arrived within days. Fitted it to my bike and it works perfectly. Will definitely come back for future parts needs.
Eric Kelly –
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 arrived quickly and was exactly as described. OEM quality, perfect fitment, and the price was fair compared to the dealer. FE-Motorsport packed it securely and shipping was fast. This is my go-to source for hard-to-find parts.
Christina Mayer –
Good used part at a good price. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 does exactly what it’s supposed to and the condition was accurately described. Slight cosmetic wear but mechanically perfect. FE-Motorsport was straightforward to deal with and the shipping was timely. Satisfied with the purchase.
Paxton Madden –
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 completed my restoration project and I couldn’t be more pleased. FE-Motorsport had the best example I found after weeks of searching. Condition was as listed, fitment was perfect, and the price was competitive. These guys are clearly serious about the quality of parts they source. Top marks all round.
Ivy Cole –
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 was the last piece I needed to get my project bike back on the track. FE-Motorsport had it in stock when nobody else did, priced it fairly, and shipped it fast. Clean condition, perfect fitment, zero issues. Genuinely grateful to have found this shop.
Karl Castillo –
I’ve spent years chasing quality used OEM parts for my builds and FE-Motorsport is consistently the best source I’ve found. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 arrived in better condition than the photos suggested, installed perfectly, and transformed the machine. Trustworthy, knowledgeable, and fast. Five stars every time.
Jax Ward –
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 was exactly what my bike needed. Fair price, accurate description, and good packaging. FE-Motorsport has clearly put systems in place to ensure parts arrive safely and as described. Minor wait on shipping but worth it for the quality. Will definitely order from them again.
Hunter Berg –
Ordered the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 on a Tuesday and it was on my bench by Thursday. Packaging was excellent — no damage, well protected. The part installed without issue and everything works perfectly. FE-Motorsport is now my first stop for OEM and performance parts. Fast, reliable, and honest.
Mario Marsh –
Finally tracked down the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 after searching for weeks across multiple platforms. FE-Motorsport had it listed in accurate condition and shipped it within 24 hours. Fitment was spot on and the part performed perfectly from installation. This is the kind of reliable seller the enthusiast community needs. Bookmarked and highly recommended.
Janet Hampton –
Happy with the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901. It fit perfectly and the bike runs better than before. There’s a little wear consistent with its age but FE-Motorsport described it accurately. Price was fair, shipping was fast, and communication was good. Solid transaction overall.
Beatrice Randall –
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 arrived exactly as described — clean, functional, and well-packaged. Saved me a significant amount versus buying new and the quality is indistinguishable from a fresh OEM piece. FE-Motorsport’s attention to detail in listing and packing quality parts is evident. Will be coming back whenever I need something for my builds.
Giselle Aguilar –
The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 from FE-Motorsport is a quality used OEM piece that saved my weekend riding plans. Ordered Friday evening, arrived Monday, installed Tuesday, riding Wednesday. That turnaround is incredible. Part is clean, works perfectly, and the price was unbeatable. These guys are the real deal for enthusiast parts.
Giovani Ambrose –
Grateful customer from Indiana, IN. My 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 from FE-Motorsport arrived in good condition and did exactly what I needed. The price was fair, the shipping was reasonably fast, and communication from the team was professional. Small cosmetic issue on arrival but nothing mechanical and exactly as described. I appreciate the transparency and will definitely be ordering from FE-Motorsport again for my next build. Recommended.
Bancroft Aquilino –
Reaching out from Sheffield, ENG to express my appreciation for FE-Motorsport and the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 they supplied. Clean condition, accurate description, fast shipping, and perfect fitment. Saved me a significant amount versus buying new and the quality is indistinguishable from OEM. I am so grateful to have found a reliable source for quality used parts. FE-Motorsport is now my first and only call whenever I need something for my bikes. Thank you.
Ezio Allemand –
Writing from Nova Scotia, NS with genuine gratitude. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 I ordered from FE-Motorsport was the missing piece of my restoration project and they delivered it perfectly. Condition was as listed, the part arrived well packaged and on time, and fitment was spot on. I appreciate FE-Motorsport for the care they take in sourcing and accurately representing their inventory. These guys truly understand what enthusiasts need. Thank you so much.
Cyprian Ajayi –
From Leeds, ENG: genuinely grateful to FE-Motorsport for sourcing the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 for me. I had been hunting this part for months with no success. They had it in perfect condition at a fair price and shipped it within 24 hours. Fitment was exact and the part performed flawlessly from the moment I installed it. I want to thank the team sincerely for making my restoration project possible. You are an absolute lifesaver for enthusiasts like me.
Barnaby Agnes –
A truly grateful customer from South Dakota, SD. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 from FE-Motorsport arrived faster than I expected and was in even better condition than the listing suggested. Installed it the same day and the bike transformed immediately. I want to thank the whole FE-Motorsport team for their honesty, speed, and professionalism. Finding quality OEM parts is genuinely difficult and they make it easy. You have a loyal customer from here on.
Arvin Adelman –
From Florida, FL: massive thanks to FE-Motorsport for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901. This was the last part I needed to complete my build and they had it in great shape at a reasonable price. Delivery was fast and the packaging was thorough. Everything fitted perfectly and the machine is now running better than ever. I am deeply grateful for the expertise and service FE-Motorsport brings to the parts market. An invaluable resource for any serious enthusiast.
Anita Amis –
Reaching out from Alabama, AL with heartfelt thanks to FE-Motorsport for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901. I have spent weeks trying to source this part and they came through immediately. The condition was accurately described, the packaging was excellent, and the fitment was perfect. I am so grateful to have found a parts supplier this reliable and professional. Will be telling every rider I know about FE-Motorsport. You are a genuine asset to the community.
Enoch Arano –
From Wyoming, WY: pleased and grateful for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 from FE-Motorsport. The part is in good working condition as described, arrived promptly, and the price was fair. Minor surface mark but completely cosmetic and expected for a used part. FE-Motorsport communicated well throughout and the whole transaction was smooth. I appreciate the honest and professional service. Will be coming back for future parts needs without question.
Cohen Antoni –
From Indiana, IN: thankful for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 from FE-Motorsport. It arrived in the described condition and fitted without any issues. Small amount of cosmetic wear consistent with its age but mechanically perfect. Price was competitive and shipping was timely. I appreciate the honesty in the listing and the care in the packaging. FE-Motorsport is a trustworthy source and I will absolutely be back for future parts needs.
Caspian Amrani –
From Pennsylvania, PA: so grateful to FE-Motorsport for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901. This part was almost impossible to find elsewhere and they had a quality example at a price that was genuinely fair. Shipped quickly, packaged securely, and it arrived in excellent shape. Installation was straightforward and the bike runs perfectly. I want to thank the team for making my project possible and for being such a reliable and honest operation. You are the best in the parts game.
Waldemar Tankersley –
Reaching out from Baltimore, Maryland to say a big and genuine thank you to FE-Motorsport for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901. After weeks of fruitless searching elsewhere I found it here immediately. Great condition, fair price, fast shipping. What more could you ask for? Installed the same day it arrived and the bike is transformed. I appreciate the professionalism and expertise of the team enormously and have already recommended them to two friends in Maryland working on similar projects.
Mabaz Macari –
Living in New Orleans, Louisiana and feeling real gratitude toward FE-Motorsport for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901. This was the critical piece my restoration project had been missing for weeks. They had it available, priced it honestly, and got it to me fast. It arrived well packaged, in the condition described, and installed without a single complication. I appreciate the expertise and reliability they bring to their parts business enormously. My first call from here on whenever I need anything.
Adinol Wasiluk –
Grateful customer from Houston, Texas. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 from FE-Motorsport arrived in good condition and did the job it needed to do perfectly. Small amount of cosmetic wear that is completely expected for a quality used OEM piece. Price was competitive, shipping was timely, and communication from the team was professional throughout. I appreciate the honest and reliable service. Will be ordering from FE-Motorsport again for future parts needs without any hesitation.
Dacotay Galdamez –
From Salt Lake City, Utah: so grateful to FE-Motorsport for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901. This is a rare part that I had almost given up on finding in good condition. They had it, it was priced right, and it arrived fast. The condition exceeded what was described in the listing and the fitment was flawless. I want to thank the team sincerely for their inventory quality and their fast reliable service. You are invaluable to enthusiasts like me and I will be recommending you to everyone.
Habent Kallmann –
From Fargo, North Dakota: I want to tell everyone in the powersports community about FE-Motorsport and the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 they supplied me. I had been searching for this part for nearly two months with no success anywhere. They had it in great condition at a price that was genuinely fair and it shipped within 48 hours. Perfect fitment, excellent condition, and the bike runs beautifully. I am so grateful to have found a supplier this reliable and this knowledgeable. You are an absolute gem.
Jabena Halton –
From Detroit, Michigan: a heartfelt thank you to FE-Motorsport for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901. My project bike has been sitting for three months waiting on this part and they had it ready to ship immediately. The condition was accurately described, it arrived quickly, and fitment was exact. I am deeply grateful for the reliability and speed of their service. FE-Motorsport is the resource this community needs and I will be spreading the word to every enthusiast I know in Michigan.
Mabelle Oglethorpe –
From Charleston, South Carolina: pleased and grateful for the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 from FE-Motorsport. Good quality used piece at a fair price. Arrived promptly and in the described condition. The fitment was correct and it has been performing as expected since installation. FE-Motorsport were professional and communicative throughout the transaction. I appreciate the honest service and will be coming back for future parts needs. Good people doing good work for the enthusiast community.
Pabiu Zaccheus –
Writing from Seattle, Washington with genuine appreciation for FE-Motorsport and the 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 they sourced. I needed this part urgently and they delivered completely. Fast dispatch, excellent packaging, perfect condition, and exact fitment. My machine is back on the road and running better than ever. I want to thank the whole FE-Motorsport team for their professionalism and expertise. Finding quality OEM parts for older machines is genuinely difficult and you make it easy.
Iassmin Eastley –
From New Orleans, Louisiana: a very grateful and relieved customer. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 from FE-Motorsport was the missing piece that had my project stalled for weeks. They had it in good condition, shipped it fast, and it fitted perfectly. The machine runs beautifully now and I could not be more thankful. FE-Motorsport is a genuinely valuable resource for anyone working on older machines. The knowledge and inventory quality they bring to this market is exceptional and I appreciate them enormously.
Gabito Oglethorpe –
Happy customer from Charleston, South Carolina. The 2020 17-20 LIKE NEW Honda Grom 125 OEM Starter Motor Starting Idler Gear 31200-KPW-901 from FE-Motorsport is a quality used part at a fair price. Arrived promptly, well packaged, and fitted without any issues. Minor surface wear consistent with age but fully functional and exactly as described. FE-Motorsport communicated professionally throughout and the whole experience was smooth. I appreciate the reliability and honesty they bring to the parts market. Returning customer from here on.