Periodic Maintenance Procedures
Drive Chain Wear Inspection
Rotate the rear wheel to inspect the drive chain for dam-
aged rollers, and loose pins and links.
If there is any irregularity, replace the drive chain.
Lubricate the drive chain if it appears dry.
[D] Pin Link
[E] Roller Link
Stretch the chain taut by hanging a 98 N (10 kgf, 20 lb)
weight [A] on the chain.
Measure the length of 20 links [B] on the straight part [C] of
the chain from the pin center of the 1st pin to the pin center
of the 21st pin. Since the chain may wear unevenly, take
measurements at several places.
Chain 20-link Length
317.5 ∼ 318.2 mm (12.50 ∼ 12.53 in.)
Service Limit: 323 mm (12.7 in.)
If any measurements exceed the service limit, replace the
chain. Also, replace the front and rear sprockets when the
drive chain is replaced.
A chain that breaks or jumps off the sprockets
could snag on the engine sprocket or lock the
rear wheel, severely damaging the motorcycle and
causing it to go out of control. Inspect the chain for
damage and proper adjustment before each ride.
If chain wear exceeds the service limit, replace it
with the standard chain.
D.I.D 520DMA2 (KX450E9F)
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 to the inside of each roller.
An effective, good quality lubricant specially formulated
for chains is best for regular chain lubrication.
PERIODIC MAINTENANCE 2-35