2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 329Get this manual

2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 329

2Using feeler gauge, measure each piston-ring end gapAcceptable ring end gap must be within specifications Measuring Piston
specificationsInstalling Piston Rings 1Install ring expander (4) in the bottom groove of the piston; then install the thin
oil rings (3) over the expander making sure the expander ends do not overlapStagger the end gaps of the upper and lower thin
oil rings according to the illustrationAn is stamped on the piston to indicate front ATV-1070 2Insert an inside dial indicator
into the piston-pin boreThe diameter must not exceed specificationsTake two measurements to ensure accuracy ATV-1085C NOTE:
Note the direction of the front (F) of the piston (5) for correct ring end gap orientation 2Install compression ring #2 (C)