Polaris Timbersled ST 120 RAW 2019 Owner's Manual page 49

MAINTENANCE
DRIVE SYSTEM
DRIVE CHAIN TENSION
TFS (TIMBERSLED FIXED STRUT) MODELS
Check drive chain tension before riding. Place a ruler on the top of the chain
tensioner pivot point. Measure a total of ½" to 5/8" up and down free play on the
top side of the chain. Do this by pinching the chain with your fingers and lightly
pushing and pulling up and down. If the chain needs to be adjusted, loosen the
jam nut on the adjuster bolt. Adjust the bolt as needed and tighten the jam nut.
Recheck again for proper adjustment.
TSS (TIMBERSLED SUSPENSION STRUT) MODELS
Always check the engine chain tension before riding. Adjust the chain so that it
is taut to the touch (zero free play) at full extension of the TSS shock. If the chain
needs to be adjusted, loosen the jam nut on the adjuster bolt and adjust as
needed. Tighten the jam nut once completed.
IMPORTANT
The chain will become looser as the TSS suspension compresses. It is
extremely important that you keep the chain adjusted properly (taut) for long
chain life and reliability.
CHAIN CASE CHAIN ADJUSTMENT
It is recommended that you check the chain case chain adjustment each time
the chain is lubed. Remove the fasteners that hold the chain case cover on.
Place a ruler against the back side of the idler sprocket with the ruler facing
back. Measure a total of 1/2" to 5/8" front to back free play on the back side of
the chain. Do this by pinching the chain with your fingers and lightly pushing it
front to back. If the chain needs to be adjusted, loosen the nut(s) that hold the
tensioner on. Adjust as needed and tighten the nut firmly. Check once more for
proper adjustment.
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