3
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
3.63
CYLINDER INSPECTION
1. Lay a straight edge across the top surface of the
cylinder at several different points
q
and measure
warp by inserting a feeler gauge between the straight
edge and the cylinder surface. If warp exceeds the
service limit, replace the cylinder.
MEASUREMENT
Cylinder Warp Limit:
.002" (0.05 mm)
2. Inspect cylinder for wear, scratches, or damage.
NOTICE
DO NOT hone the cylinders or attempt to repair a
damaged cylinder by honing.
3. Inspect taper and out of round with a dial bore
gauge.
4. Inspect cylinder for taper and out of round with a dial
bore gauge. Measure in two different directions (front
to back and side to side), on three levels (0.59 in.
down from top, the middle, and 1.54 in. up from
bottom). Record measurements. If cylinder is
tapered or out of round beyond the service limit, the
cylinder must be replaced.
MEASUREMENT
Cylinder Taper:
Service Limit: 0.001" (.025 mm)
Cylinder Out of Round:
Service Limit: 0.001" (.025 mm)
MEASUREMENT
Standard Bore Size:
3.6614 ± .0003" (93 mm ± .008 mm)
ENGINE / COOLING SYSTEM
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