Zero Motorcycles MX 2012, Owner'S Manual

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5-10
•
Inside (tooth portion) of belt for exposed tensile
cords normally covered by nylon layer and
polyethylene layer. This condition will result in belt
failure and indicates worn sprocket teeth.
•
Signs of puncture or cracking at the base of the
belt teeth.
If any of the above conditions are found, the belt
should be replaced.
Checking Drive Belt Tension
Proper belt tension is essential for optimum operation
of the drive system.
Lack of belt tension can lead to so-called “ratcheting”.
The teeth of the belt will slide over the teeth of the
rear sprocket. This causes not only an unpleasant
sound; the ratcheting can also cause damage to the
carbon tensile cords. If ratcheting has occurred you
should replace the belt before the next time you ride.
Too much tension can increase the wear of your drive
system and the system can drag.
The tension is checked by using a Tension Tester.
The Tension Tester has a plastic measurement arm,
located in a slot. Along this slot there is a measuring
scale. The point of intersection of the measurement
arm and the measuring scale shows the tension
of the belt. There is a button (clicking pad) on the
upper side of the Tension Tester, where you can secure
your finger with a rubber band holder. A spring is
located underneath this clicking pad. If a certain
pressure is applied to the spring, it makes a
clicking sound.