All you need is to know is the Vin #'s on the quad.
If it is the VIN number you are looking for, it should be located on the frame by the foot shifter.
what year is my kodiak atv vin is jy44sha06va068103
VIN number is stamped on the lower frame in the back of the left front wheel well.
buy the gas tank
1875
The tenth digit in the VIN will tell you the year. 1 for 2001, 2 for 2002, etc.
1978 dt4
1999
That would be a 1978
Many states require an ATV like the Yamaha Big Bear 350 4x4 to have a title registered in the name of the owner. If the VIN is worn away, the title is the next source for finding out what year it was manufactured.
On the steering shaft stamped on an aluminum plate