Drive Chain Adjustment; Steering Mechanism - Sym Wolf SB 250 Ni Service Manual

2. Maintenance Information

Drive chain adjustment

Drive chain inspection
Place the bike on its main-stand with its neutral
gear. Check the drive chain slack by moving the
chain up and down by fingers, and measure the
amount of chain slack.
Standard chain slack：10~20 mm
Caution
Because the front and rear sprocket have

different wearing situations, so please rotate
the rear wheel to find the minimum chain
slack for the measurement.
Drive chain adjustment
If you need to adjust the chain slack, please
loosen the rear axle nut and sleeve nut first.
Turn the left and the right side adjusting nut evenly
to make the chain slack within the standard range.
Turn the nuts clockwise to tighten the chain, or
counterclockwise to loosen the chain.
Torque value：4.0~5.0kgf-m
After tightening the rear axle nut, please check the
sleeve nuts to prevent them from loosening.
Recheck the chain slack, and make sure the rear
wheel rotates smoothly.
If the chain is too dirty, use high-flash point
solvents to clean the chain. (Kerosene or Diesel.)
Caution
 Don't use gasoline when cleaning the chain.
The gasoline will damage the O-ring in the
chain.
After cleaning, lubricate the chain with chain
lubricant.

Steering mechanism

Caution
Check all wires and cables if they are

interfered with the rotation of steering handle
bar.
Lift the front wheel off the ground.
Turn handle from right to left and check if turning
is smoothly.
If handle is uneven or bending, or the handle can
be lifted through vertical direction, adjust the
handle top bearing.
2-8
Rear axle nut
Lock nut
Adjusting nut