Yamaha Motorcycle Engine Serial Number Decoder

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Yamaha Model Code Reference Chart. It is important to know your Yamaha outboard model code and/or your Primary ID Number (serial number).

  1. Yamaha models can be identified by locating and decoding the crankcase engine number. Yamaha uses a standardized numbering system, which is broken into four sections: model code, basic part number, design code and the finish code.
  2. What is the size and year for Yamaha dirt bike engine, serial number 363-022251. I only have the motor no frame Hi, Hayley 1974 Yamaha SC500A Motorcross Dirt Bike. 500cc Good luck and have a nice day.

Does anyone know of a site to decode engine serial numbers for yamaha motorcycles?
A friend of mine just bought a 4 wheeler that someone put an inline 4 cylinder yamaha motorcycle engine in. He believes it is 750cc but wants to find out exactly what it is in order to purchase parts.

Any help is appreciated.

Thanks...

Try this one...

Thanks. Do you know if there's a section on there to plug in just the engine serial number and find what bikethe motor came from?
The engine serial # is
2AX-000208

send a pm to bignumber1 or jamahadim on here
there both yamaha dealers and should be able to help
all the decoders i find you need the whole vin

I'm not certain you can 'decode' motorcycleengine serial numbers, only the VIN. It's possible that this information could have recently changed making it available, but not to my knowledge (or lack thereof). I'll be interested in learning if this has changed.

Motorcycles are just like cars! The vin# match. but this one looks like a pre 80's before they started using 17 digit vin#. I already tried to help this one, as he posted it elsewhere on this forum under the name QUAD750. the method of decoading that I gave him only works on 17 digit vin's.

The first three digits in a yamaha part code represent the model and will match the first 3 in a pre 1981 VIN. From what I can tell that's not a motorcycle engine.

After 1981 Yamaha went with the long VIN still common today. The model code wasn't always clearly represented in the VIN but they continued along that theme for most of the part numbers. ITSdarted becoming more difficult to separate them when Yamaha started producing multi fit parts. Say a fuel cap for an 1100 V* fitting the 650 and other models.

XVS1300A

That engine code however is specific to a pre 1981 yamaha. The only problem is that the 2AX code doesn't show anywhere in the parts fiche's I can find online. That doesn't mean it's not there, just not in the street bike databases I can find. Stop buy you local dealer with that engine code and they should be able to help you out.

Yamaha Motorcycle Engine Serial Number

I called Yamaha and they were unable to find that engine number in their data base. It is an older number. Sorry.

Bummer ! I love all the info about where to check it out but my problem is a little different . My bike was part of a pair of bikes in pieces that the previous owner threw back together. My frame and engine may not match . My problem is I cannot find where the engine or frame numbers are located. Anyone ? Please help a brother out

Can you post a couple pictures of the engine?

Yamaha Motorcycle Engine Serial Number Decoder Vin

Soon as I take some and figure out how to post them Bubba .Thanks I appreciate the quick reply

How VINs Work | HowStuffWorks

OK I have been doing some research and found out a few things . MY bike was repainted blue,its original color was a metallic yellow orange .It has drum brakes front and back My most educated guess is a 71 XS B1 . Any thoughts ? I read that were only about 10.000 or so made