2-36 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
Drive Chain Lubrication
The chain should be lubricated with a lubricant which will
both prevent the exterior from rusting and also absorb
shock and reduce friction in the interior of the chain.
If the chain is especially dirty, it should be washed in
diesel oil or kerosene, and afterward soaked in a heavy
oil. Shake the chain while it is in the oil so that oil will pen-
etrate into the inside of each roller.
An effective, good quality lubricant specially formulated
for chains is best for regular chain lubrication.
If a special lubricant is not available, a heavy oil such as
SAE90 is preferred to a lighter oil because it will stay on
the chain longer and provide better lubrication.
Apply oil to the sides of the rollers so that oil will penetrate
into the rollers and bushings.
Wipe off any excess oil.
Oil Applied Area [A]
Sprocket Wear Inspection
Visually inspect the front and rear sprocket teeth for wear
If they are worn as illustrated or damaged, replace the
sprocket, and inspect the drive chain wear.
Worn Tooth (Engine Sprocket) [A]
Worn Tooth (Rear Sprocket) [B]
Direction of Rotation [C]
If a sprocket requires replacement, the chain is proba-
bly worn also. When replacing a sprocket, inspect the
Rear Sprocket Warp (Runout) Inspection
Using the jack, raise the rear wheel off the ground.
Special Tools - Jack: 57001-1238
Jack Attachment: 57001-1608
Set a dial gauge [A] against the rear sprocket [B] near the
teeth as shown in the figure.
Rotate [C] the rear wheel slowly to measure the sprocket
The difference between the highest and lowest dial gauge
readings is the amount of warp (runout).
Rear Sprocket Warp (Runout)
TIR 0.4 mm (0.016 in.) or less
TIR 0.5 mm (0.020 in.)
If the runout exceeds the service limit, replace the rear