2007-2009 Honda TRX300EX TRX300X service manual, Page 142Get this manual
CYLINDERPISTON PISTON REMOVAL Place clean shop towel over the crankcase to prevent the clip from falling into the crankcase
Remove the piston pi clip with pliersPush the piston pin out of the piston and connecti ng rodand remove the piston
Do not damage the piston rings by spreading the ends too far
Spread each piston ing and remove it by lifting up at po int opposite the gap
Never use wire brush; it will scratch the groove
Clean carbon deposits from the piston ring grooves with ring that will be discarded