Join Date: Jul 2015
Location: slower lower Delaware,second home on lake Conesus in NY. keep a 93&94 vxr pro there.
Welcome aboard Tom5555
50/1 is a good mix ratio for it.
Parts are still available from Yamaha at either Babbittsonline or Partszilla. You can also find parts used on eBay. by taking the Yamaha part number and searching it on ebay as "Yamaha then #" or by application 1991 Yamaha etc.
Clymer makes a pretty good manual that will help you with maintenance. Babbittsonline schematics can also help with exploded views of the different part zones, eng, exhaust, carb, jet pump, etc.
Are you sure of the year? Model?Somewhere on the rear either on the deck or below the bump rail is a HIN tag. About a half inch wide x 2.5 long. BLK in color and rivited on. The last 2 digits are the year. Also in the motor compartment should be a sticker with the model number such as WRB650B. See pic below.