Kawasaki KX250F - Owner's Manual - page 92
91
j
A. Turning Clockwise
WARNING
A loose axle nut can lead to an accident re-
sulting in serious injury or death. Tighten
the axle nut to the proper torque and install
a new cotter pin.
•
Check the rear brake effectiveness.
NOTE
○
When riding in wet and muddy conditions, mud
sticks to the chain and sprockets, resulting in an
overly tight chain, which can cause it to break.
To prevent this, adjust the chain slack (measured
between the chain and the swingarm) to 62
∼
68
mm (2.4
∼
2.7 in.).
Chain Wear Inspection
When the chain has reached its wear limit (i.e.,
when it has stretched by 1.7% of its original length),
it is no longer safe for use and should be replaced.
Since it is impractical to measure the entire length of
the chain, determine the degree of wear by measur-
ing a 20-link section of the chain.
•
Tighten the chain either by using the chain ad-
justers or by hanging a 10 kg (22 lb) weight on the
chain.
•
Measure the 20-link length on a straight part of the
chain from the center of the 1st pin to the center
of the 21st pin. If the length exceeds the service
limit, the chain should be replaced. Since over-
worn sprockets will cause a new chain to wear
faster, inspect both the engine and rear sprockets
whenever the chain is replaced, and replace them
if necessary.