Yamaha Rotary Valve bumper stop, 2 or 10 pack. Contact me to confirm your model's fit or you need other parts.
Rubber Bumpers YBB YBL YCB YEB YSL, D5.5mm x L4.5mm. Yamaha P/N D0841021
Rubber Bumpers YFH YHR YSL YTR, D5.5mm x L6mm. Yamaha P/N E0141020