3.86
9940259 R02 - 2022
RZR
PRO R / PRO R 4 Service Manual
© Copyright Polaris Industries Inc.
3. Install upper rail with end gap positioned on the
exhaust side of piston.
Upper Rail
Gap Position
Lower Rail
Gap Position
Spring Expander
Gap Position
4. Install second ring with marking facing top of piston.
Rotate ring to position the end gap toward intake side
of piston as shown below.
Second Ring
Gap Position
5. Install top ring with mark facing top of piston. Rotate
ring to position the end gap toward exhaust side of
piston as shown below.
Top Ring
Gap Position
6. Be sure top and second rings rotate freely in their
grooves and do not bind when compressed by hand.
