Counterbalance Shaft Removal / Inspection - Polaris Sportsman XP 1000 S 2020 Service Manual

1. Push connecting rod / piston assembly out through
top of cylinder bore of upper crankcase.
NOTICE
If pistons are to be reused, mark them for assembly in
same cylinder.
2. See Piston Ring to Groove Clearance Inspection
page 3.62.
COUNTERBALANCE SHAFT REMOVAL /
INSPECTION
1. Note timing marks on balance shaft drive gears and
crankshaft drive gear. Shafts must be properly timed
upon assembly.
2. Mark each shaft location for assembly (starter side or
oil pipe side).
3. Lift both balance shafts from upper crankcase and
remove end plugs.
9931493 R03 - 2020-2021 Sportsman XP 1000 S Service Manual
© Copyright Polaris Inc.
ENGINE / COOLING SYSTEM
4. Inspect both counterbalance shaft bearings.
NOTICE
Due to extremely close tolerances, balance shaft
bearings must be inspected visually and by feel. Look
for signs of discoloration, scoring, galling or
contamination from moisture or dirt. Turn bearings on
shaft. Bearings should turn smoothly and quietly. The
outer race should be firm with minimal side to side
movement and no detectable up and down movement.
Replace the balance shaft as an assembly if any of the
above are present.
5. Inspect gear teeth for damage. Normal split gear
alignment is approximately 1/2 tooth in the relaxed
position as shown.
q
6. Hold main gear and rotate split gear
counterclockwise (viewed
e
compress springs . Split gear should rotate and
return freely and completely without binding.
3
w
from gear end) to
3.57