2007 Arctic Cat Four-Stroke Factory Service Manual, Page 71Get this manual
Installing Piston Rings (1100 cc Z1)
1Install thin oil ring, oil ring expander, and thin oil ring in the bottom groove of the pistonStagger the end gaps of the upper and lower thin oil rings until they are on directly opposite sides of the piston
ATV-1070
MEASURING CONNECTING ROD SMALL END BORE INSIDE DIAMETER
1Using small bore gauge, measure the connecting rod small end bore inside diameter741-619A
2Install the #2 compression ring so the letters on the top surface of the ring face the dome of the piston3Install the #1 compression L-ring into the top groove with the face of the ring directed upward4Rotate the rings until the ring end gaps are no less than 90 from one another
2Measurement must be within specifications