1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 79Get this manual
CYLINDERPISTON PISTONCYLINDER INSTALLATION Clean off any gasket material from the crankcase surfaceNOTE
Be careful not to damage the gasket surfa ce
Install the piston and piston pin, using new piston pin ClipsNOTE
Position the pistonINmark on the intake valve side00 not align the piston pin clip end gap with the piston cut -
out00 not let the clip fall into the crankcaseInstall new gasket and dowel pins