1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 97Get this manual
CYLINDERPISTON Inspect the top of the cylinder for warpage
SERVICE LIMIT: 0.10 mm (0.004 in)
REMOVAL
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
CAUTION
Always support the piston when pressing out the piston pin to prevent damage to the big-end bearing