Owner's guide
United Motors of America: 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
- 2007–2009
- Engine factories
- 2
- Engine families
- 10
- Badges alongside
- 4
Who built the engine in your United Motors of America
United Motors of America Inc. 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. The record names 2 different Chinese engine factories across United Motors of America's filings — which means the badge alone does not tell you which engine you have.
- Skyteam Corp. Ltd.
- Zhejiang Taizhou Wangye PowerVIN prefix LFF
It changed, and the year tells you which
This is the most useful thing on the page if you are buying parts. Two United Motors of America machines of different years can have engines from different factories, so a part that fits one may have nothing to do with the other.
| Model year | Engine built by |
|---|---|
| 2007 | Skyteam Corp. Ltd. |
| 2008 | Skyteam Corp. Ltd. · Zhejiang Taizhou Wangye Power |
| 2009 | Zhejiang Taizhou Wangye Power |
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 United Motors of America specifically is which number settles things: with 2 factories on the record, the engine family number is what tells you which engine you have.
- 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 United Motors of America
If the label under your seat carries one of these, it is a United Motors of America and this is the certificate it was sold under.
| Engine family | Model years | Displacement |
|---|---|---|
| 7UMAX.049DTF | 2007 | 49cc |
| 7UMAX.086DTF | 2007 | 110, 86cc |
| 7UMAX.150DTF | 2007 | 149cc |
| 8UMAC0.15NFG | 2008 | 149cc |
| 8UMAC0.17MTX | 2008 | 169cc |
| 8UMAX.049DTF | 2008 | 49cc |
| 8UMAX.086DTF | 2008 | 110, 86cc |
| 8UMAX.150DTF | 2008 | 149cc |
| 9UMAC0.15NFG | 2009 | 149cc |
| 9UMAC0.17MTX | 2009 | 169cc |
The other names to search under
4 other US brands sold machines whose engines came from the same factory at the same displacement. When a search for “United Motors of America” returns nothing, these are the names worth trying instead.
How to search for a part
Searching the badge is searching the weakest information you have. These are built from United Motors of America's own record, roughly strongest first — replace <part> with what you need, and add the measurement you took.
- 17UMAX.049DTF <part>
- 249cc <part>
- 3Skyteam 49cc <part>
- 4Mod Cycles Corporation <part>
- 5United Motors of America Inc. <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 United Motors of America, 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. United Motors of America Inc. filed 22 certificate rows in total, of which 12 are covered here, about 55%. 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 United Motors of America 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.