Some items from this specific schematic: Brg,ball 17x40x12, Ring Set,piston (, Piston (0.50), Shaft Comp,balanc.
The most reasonably priced component used on the Trx300 Fourtrax 300 1989 (k) Usa Crankshaft is the Clip,piston Pin.
The nineteen Trx300 Fourtrax 300 1989 (k) Usa Crankshaft component parts are all listed in this schematic.