2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 153Get this manual
CYLINDER AND PISTON 5Offset: Piston ring end gaps
Top ring Upper oil ring rail Oil ring expander Lower oil ring rail 2nd ring 20 mm
CYLINDER AND PISTON 5Offset: Piston ring end gaps
Top ring Upper oil ring rail Oil ring expander Lower oil ring rail 2nd ring 20 mm