Page 157 - Manual Oficina Polaris RS1 2018 e 2019

ENGINE / COOLING SYSTEM

PISTON RING INSTALLED GAP PISTON-TO-CYLINDER CLEARANCE

1. Place each piston ring q inside the cylinder w. Use Measure piston outside diameter at a point 10 mm q up
the piston to push the ring squarely into cylinder, as from the bottom of the piston, at a right angle to piston
shown below. pin bore.
2. Measure installed gap with a feeler gauge e at both Subtract measurement from maximum measurement
the top and bottom of the cylinder. obtained in Step 4 of Cylinder Inspection, page
3.67“Cylinder Inspection” procedure.
NOTE
A difference between top and bottom end gap
measurements is a general indication of cylinder taper
(wear). The cylinder should be measured for taper and 3
out of round.

MEASUREMENT
Piston O.D. (Standard):
3.6597 ± .0003" (92.959 ± 0.008 mm)

3. If the installed gap measurement exceeds the service Piston to Cylinder Clearance:
limit, replace the rings. .0009 - .0019" (0.025 - 0.050 mm)
MEASUREMENT
Piston Ring Installed Gap:
Top Ring: .010 - .014" (0.25 - 0.35 mm)
Service Limit: 1.6118 - 1.6122" (40.942 - 40.950 mm)

Second Ring: 1.6118 - 1.6122" (40.942 - 40.950 mm)
Service Limit: .028" (0.70 mm)

Oil Control Rails: .008 - .028" (0.20 - 0.70 mm)
Service Limit: .0354" (0.9 mm)

NOTE
Always check piston ring installed gap when installing
new rings and/or a new cylinder.

9928689 - 2018 RZR RS1 Service Manual 3.71
© Copyright Polaris Industries Inc.