Replace it if necessary.

Inner Tube Inspection
Spring Tension InspectionBolts, Nuts and Fasteners Tightness Inspection
Check the tightness of the bolts and nuts listed here. Also,
check to see that each cotter pin is in place and in good
condition.
NOTE
For the engine fasteners, check the tightness of them
when the engine is cold (at room temperature).
If there are loose fasteners, retighten them to ...
Swingarm Removal
Remove:
Rear Wheel (see Rear Wheel Removal in the
Wheels/Tires chapter)
Mud Guard with Rear Brake Hose (see Mud Guard Removal
in the Frame chapter)
Rocker Arm (see Rocker Arm Removal)
Remove:
Brake Hose Clamp Bolt [A]
Unscrew the swingarm pivot shaft nut [A].
Usi ...
Fuel Tank Cleaning
WARNINGGasoline and low flash-point solvents can
be
flammable and/or explosive and cause severe
burns. Clean the tank in a well-ventilated area, and
take care that there are no sparks or flame anywhere
near the working area. Do not use gasoline
or low flash-point solvents t ...