2003 Honda ATV TRX650FA Rincon Factory Service Manual, Page 174Get this manual
CYLINDER PISTON Check the top of the cy linder for warpage with straight edge and fee le ga uge across the st ud ho les
SERVICE LIMIT: 0.05 mm (0.002 in)
PISTONPISTON RING
Inspect the piston ri ngs for smooth movement by rotating the the The ings shou ld be able to move in thei grooves ithout catch ing Push the ring until the outer su rface of the pisto ring is nearly flush ith he piston and measu re the ring-ta -ring groove clearance
SERVICE LIM ITSTo p: 0.095 (0.0 037 in) Second0.075 (0.0030 in)