Polaris 850 MATRYX INDY XC 129 2021 Manual page 387

14. Note the alignment dowels
15. Inspect the cover gasket for damage. Inspect the
bearing and seal in the cover. Replace bearing if it no
longer rolls smoothly. Replace the seal if damaged.
16. Remove the lower gear fastener
Note the beveled washer orientation.
17. Loosen the chain adjuster jam nut
9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
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i
in the chaincase.
o a
and washer .
s d
and bolt .
FINAL DRIVE / BRAKE SYSTEMS
f
18. Remove the spacer on the jackshaft.
19. Remove the upper sprocket
j
sprocket as an assembly.
20. Inspect the sprockets for wear and replace as
required. Inspect the chain for frozen links and
damage. Replace as required.
21. Clean the inside of the chaincase housing.
g h
, chain , and lower
6
6.15