1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 76Get this manual
CYLINDERPISTON Inspect the top of the cylinder or warpageSERVICE LIMIT0.10 mm (0 .004 in)
REMOVA L
Remove the piston pin clip with pliersNOTE
Do not let the clips fall into the crankcase
Press the piston pin out of the piston and remove the piston
11 PISTON