1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 98Get this manual
CYLINDERPISTON Temporarily install the piston rings to their proper position with the mark facing upMeasure the piston ring-to-groove clearance with the rings pushed into the groovesSERVICE LIMITS: Top: 0.09 mm (0.004 in) Second: 0.09 mm (0.004 in) Insp,ect the piston for wear or damage
Insert each piston ring squarely into the bottom of the cylinder and measure the ring end gapNOTE Push the rings into the cylinder with the top of the piston to be sure they are squarely in the cylinder