Owner's guide
Yamaha Motor: finding your numbers, your engine and your parts
You own one. Here is what the federal certification record says about who actually built it, what to look for on the machine itself, and how to search for parts when the badge gets you nowhere.
- Model years
- 2018–2027
- Engine factories
- 1
- Engine families
- 10
- Badges alongside
- 0
Who built the engine in your Yamaha Motor
Yamaha Motor Corporation is the name on the certificate filed with the US EPA. That is the company that brought the machine into the country, not the company that built the engine. Every Yamaha Motor certificate on the record names one Chinese engine factory: Chongqing Jianshe-Yamaha Motor Co., Ltd..
The numbers to find on the machine
Where these live depends on the shape of your machine rather than on the badge, so we do not repeat the search here — the sheets below cover it properly and are free. What matters for a Yamaha Motor specifically is which number settles things: the engine family number ties your machine to a specific federal certificate rather than to a badge.
- The emission control information label
Carries the engine family number. This is the strongest identifier your machine has and the one most owners have never looked at.
- The code stamped into the crankcase
Survives when the label has not. It encodes cylinder count, orientation, bore and displacement class.
- The VIN
Identifies the vehicle rather than the engine, and its first three characters name whoever registered it for sale.
Engine families on the record for Yamaha Motor
If the label under your seat carries one of these, it is a Yamaha Motor and this is the certificate it was sold under.
| Engine family | Model years | Displacement |
|---|---|---|
| JYMXX.049AAB | 2018 | 49cc |
| KYMXX.049AAB | 2019 | 49cc |
| LYMXX.049AAB | 2020 | 49cc |
| MYMXX.049AAB | 2021 | 49cc |
| NYMXX.049AAC | 2022 | 49cc |
| PYMXX.049AAC | 2023 | 49cc |
| RYMXX.049AAC | 2024 | 49cc |
| SYMXX.049AAC | 2025 | 49cc |
| TYMXX.049AAC | 2026 | 49cc |
| VYMXX.049AAC | 2027 | 49cc |
How to search for a part
Searching the badge is searching the weakest information you have. These are built from Yamaha Motor's own record, roughly strongest first — replace <part> with what you need, and add the measurement you took.
- 1JYMXX.049AAB <part>
- 249cc <part>
- 3Chongqing 49cc <part>
- 4Yamaha Motor Corporation <part>
The strongest search usually has no badge in it at all. An engine family number plus a measurement finds listings from sellers who have never heard of Yamaha Motor, which is most of them.
Free sheets to take to the machine
- What scooter do I actually have?A one-sheet record of every number that identifies your machine — badge, VIN, engine number, engine family and factory. Fill it in once, photograph it, and never hunt for it again.
- Where is the emission label? Sorted by body styleThe most useful label on the machine, organised by what shape your machine is rather than by what it says on the bodywork.
- Where is the VIN on a Chinese scooter?A search checklist for the VIN, frame number, engine number and emission label — including the places people look last and should look first.
- What the engine code on your crankcase meansEvery character in the code stamped on your crankcase, what it means, and why 139QMB and 1P39QMB are the same engine.
- Badge twins: the other names your scooter was sold underThe same machine was sold under other names. Those names are extra search terms, and this is where you write them down.
- Before you order a scooter part: checklistTwelve checks that take ten minutes and prevent the single most common expensive mistake these machines produce.
Or print all fifteen at once — 44 pages covering identification, measurement, records and diagnosis. Free, no account, no email.
What this page does not tell you
This record covers certificates whose engines were built in China. Yamaha Motor Corporation filed 918 certificate rows in total, of which 20 are covered here, about 2%. The rest had engines built elsewhere and are outside this registry's scope.
It also cannot tell you that a part fits. A shared factory is a research lead — a list of other badges worth searching under — and nothing more. These machines are assembled from several component suppliers, and those suppliers change, sometimes inside a single model year. Why that is, and how to measure instead.
Elsewhere in the registry
- The full Yamaha Motor recordEvery certificate, model and year
- Identify a machineFrom an engine family, a VIN prefix or a badge
- All free printables81 sheets, Letter and A4
- Printable measuring gaugesBelts, rollers, bolt patterns
Source. US EPA annual certification data — EPA Certified Highway Motorcycle Test Results, MY2006-present; EPA Certified Off-Road Motorcycle / ATV / UTV / Rec Vehicle, MY2006-present. Retrieved 2026-09-07. Full provenance and method.