1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 100Get this manual
CYLINDERPISTON Apply molybdenumdisulfide grease to the outer surface of the piston pinInstall the piston and piston pin, using new piston pin clips,
Position the piston "IN" mark on the intake valve side Do not align the piston pin clip end gap with the piston cutout Do not let the clips fall into the crankcase
(3) GA (4) CUTOUT
Clean off any gasket material from the cylinder base and crankcase upper surfaces