Yamaha gives similar names to its carts, starting with model G1 then down through numbers G2 to G3 and on into the G20s. They are seldom identified as such, however, and since models vary little in appearance the only sure way to identify your Yamaha is through the serial number.
Serial Number--Early Models
Serial numbers on early models appear underneath the rear bumper.
Serial Number--Later Models
Later Yamaha's have their serial number underneath the seat, beneath the glove box, or along the front rubber molding.
Examine the Charts
Yamaha serial numbers do not contain information on the year. They can, however, narrow down the search by finding shared characteristics inside charts of Yamaha identification codes. The G16, for instance, always contains JN6 in its code.
Finding the Year
Cross-apply the code to find the model type. JN6, for example, appears on G16 models manufactured from 1996 through 2002. A specific date may be found by submitting your serial number to a website devoted to repairing or collecting Yamaha golf carts.