1999-2002 TRX400EX Fourtrax Service Manual, Page 117Get this manual
CYLINDERPISTON
PISTONCYLINDER INSTALLATION
PISTON RING INSTALLATION
Carefully install the piston rings into the piston ring grooves with the markings facing upCAUTION: TOP RING SECOND RING OIL RING
Be careful not to damage the piston and rings during installation,
NOlE: Do not confuse the top and second rings To install the oil ring, install the spacer first, then install the side railsStagger the piston ring end gaps 120" degrees apart from each otherStaggerthe side rail end gaps as shownMARK
TOP RING
1 SECOND RING