Free printableIdentify your machineTSP-ID-05
How to read a Chinese scooter VIN, character by character
What each of the seventeen characters means under US federal rules, and the two traps that make a motorcycle VIN harder to read than a car one.
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TSP-ID-05 · version v1.0 · September 2026. Opens in your browser's PDF viewer, where you can print directly.
The problem it solves
Free VIN decoders return nothing useful for these machines, and the ones that do return something are often guessing. The structure itself is defined by federal regulation and can be read by hand — but two rules that most decoders ignore apply specifically to motorcycles, and both produce confidently wrong answers.
A VIN on a US-market vehicle is not a serial number with extra characters. Its structure is set out in 49 CFR Part 565, and once you know which positions carry which meaning you can read most of it without any tool at all.
Two things make a motorcycle VIN harder than a car one, and commercial decoders routinely get both wrong. The first is the model-year character: it repeats on a thirty-year cycle, and the tie-breaker rule that resolves the ambiguity for cars does not extend to motorcycles. The second is the low-volume manufacturer rule, which moves the serial number to different positions — and small importers, which is most of this market, are exactly who it applies to.
This sheet quotes the regulation rather than paraphrasing it, so you can check us.
The mistakes this sheet exists to prevent
- Trusting a free online decoder. Most return nothing for these machines, and some return a confident guess.
- Reading position 10 as the model year and stopping. On a motorcycle that character cannot fix the year on its own.
- Assuming positions 12 to 17 are the serial number. If position 3 is a 9, they are not.
- Reading an I, O or Q. Those three characters cannot appear in a US VIN at all — you are looking at 1, 0 or 0.
- Assuming the first three characters name the factory. They name whoever registered the vehicle for sale, which is usually the importer.
Who it is for
- Anyone whose VIN lookup came back empty or implausible
- Buyers checking that a VIN is structurally valid before handing over money
- Anyone filling in a title or registration application
What is on it
- The position-by-position structure, quoted from 49 CFR 565.15
- The model-year character table, with both possible years for each
- The low-volume manufacturer rule that moves the serial number
- The three characters a VIN can never contain
- A seventeen-box transcription grid
How to use it
- 01Write the VIN into the grid one character per box before you decode anything.
- 02Check for I, O and Q first. Finding one means you have misread a 1 or a 0.
- 03Decode positions 1 to 3, then 9, 10 and 11, then read the notes on what position 10 cannot tell you.
- 04Confirm the year from the certification label or the title, not from the VIN alone.
Also in a pack
Use it with the registry
Other sheets you may want
- 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 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.
- Used Chinese scooter inspection checklistWhat to check before handing over money, in the order you can check it, including the paperwork problems specific to these machines.
Free to print, copy, and share — including in forums, clubs and workshops. If you find a mistake on this sheet, tell us and it gets corrected. Quote TSP-ID-05 and the version so we know exactly which sheet you mean. All printables.