1981-1984 Official Honda ATC250R Shop Manual, Page 52Get this manual

CYLINDER HEADCYLINDERPISTON
ATe 250R

PISTON REMOVAL
Remove the piston pin clip using pair of needlenose pliersPress the piston pin free of the pistonNOTE Do not damage or scratch the pistonDo not apply force to the piston pinDo not let the clip fall into the crankcase

PISTON PIN

PISTON RING REMOVAL
Spread each piston ring and remove by lifting it up at point just opposite the gapCAUTION:

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives