Chain Tensioner - Polaris 120 XC SP Youth Universal Owner's Safety And Maintenance Manual

MAINTENANCE
Brake Lever Travel
B
Measure the clearance between
the lever and brake block.
Inspection should be made with
the lever firmly depressed.
Distance B should be no more
than 3/4" (1.9 cm)
Excessive travel indicates a need
to adjust the brake cable adjuster.
Refer to the mechanical brake
adjustment information on page
A- -47.

Chain Tensioner

Inspect the chain. The chain should have 1" of deflection as shown. If
not, loosen the nut on the chain tensioner (A) and raise until 1" (B) of
deflection is attained. Tighten nut to 15-18 ft. lbs.
When the chain comes within 1/8" (C) of the muffler mount bracket
(D) on the chassis, the chain has stretched and must be replaced.
Inspect the sprockets as they also become worn and often need
replacement when the chain is replaced.
D
B
C
A
A--48