2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 150Get this manual
CYLINDER AND PISTON
2Install: Piston ring (into the cylinder) NOTE: Level the piston ring into the cylinder with the piston crown40 mm (1.476 in)
CYLINDER AND PISTON
2Install: Piston ring (into the cylinder) NOTE: Level the piston ring into the cylinder with the piston crown40 mm (1.476 in)