Polaris 9919510 Owner's Manual For Maintenance And Safety page 148

Chain Tension
Check the amount of chain slack by moving the vehicle slightly forward to remove slack at
the top side of the chain.
NOTE: The chain has a press-on master link. A chain tool must be used if it's necessary
to remove the chain for service.
1. Collapse the suspension with an adjustable (buckle type) trailer tie down strap (A).
Fasten the strap around the axle and rear bumper tube.
2. Tighten the strap until a straight line (B) can be drawn from the axle to the transmission
output shaft, intersecting the swing arm pivot. This establishes the tightest chain
position.
3. At this point (C) the chain should have 1/4" - 3/8" (.6 -.9 cm) deflection. Use the
procedure on the following page if the chain needs adjustment.
ADJUSTMENTS
145