Usually, on the front down tube though it can vary by make.
that is the vin number and the serial number
jh2pc2538tm550135
jyavm01e61a032625
i am trying to find the year of this motorcycle and model jm2he0438wk201240
I did not find a way to check the VIN on your own, however, I did find a website DMV.org. I have not owned a motorcycle so I have not performed this search for a VIN personally. But this website seems to be very user friendly.
There are various web sites that can provide you with information about Motorcycle VIN records. Try one of the ones listed below:
You can decode the VIN number online. Find the VIN on your registration or stamped on the frame, usually right on the neck.
call the tag office with the VIN
The VIN JSKDF43D442100284 belongs to a 2004 Suzuki of unknown model.
The VIN could be on you license or registration. It could also be on the insurance card. If you find it on one of those then go to this website http://www.cyclevin.com/ It costs $23 but at least you would find your motorcycle.
VIN number for a motorcycle check rg4465wm004297
You can do a motorcycle vin lookup on the cyclevin website. That site allows you to enter the vin or motorcycle information. They will list results found for you to record.