2004-2005 Honda TRX450R Factory Sevice Manual, Page 166Get this manual
CYLINDERPISTON Do not damage the
pis ton rings by
spreading the ends too far,
Sprea each piston ring and rem ove it by lifting up at point opposite he gap
Neve use wi re brush; it will scratch the groove
Clean carbo deposits from he pi ston rin gr ooves
with ring tha will be disc arded f
INSPECTION
CYUNDER Inspect the cylinder all for scratches or wea rMeasure the cy linder I.Dat th ree levels in th and axisTake the ax im um read ing to eterm ine the