I can't find a new piston for my rae racer 3 engine. It's the one with the single piece cylinder and head. And the 50mm bore The crank arm says yd100 on it. cant find a piston with identical dimensions anywhere. Another of vendors don't even bother listing dimensions
CDHPOWER CDH50mm YD100/LD100 Piston Kit 50mm. CDHPOWER CDH50mm YD100/LD100 Piston Kit 50mm. The Real YD100 with these marks on your engine can use CDHPOWER needle bearing and the piston pin. CDHPOWER Support Team.