1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 99Get this manual
CYLINDERPISTON Measure the O.Dof the piston pinSERVICE LIMIT: 16.96 mm (0.668 in) Calculate the piston-to-piston pin clearanceSERVICE LIMIT: 0.02 mm (0.001 in)
Measure the connecting rod small end I.DSERVICE LIMIT: 17.10 mm (0.673 in)
PISTONCYLINDER INSTALLATION
Clean the piston ring grooves thoroughly and install the piston ringsNOTE Apply oil to the piston ringsAvoid piston and piston ring damage during installationInstall the piston rings with the markings (T or R) facing upDo not mix the top and second rings; the top ring is narrower than the second ring in width (1) TOP RING