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Chassis Service / Parts
CS1: Wheels & Tires
Rear wheel
Rear wheel dampening
Tools recommended for wheel service:
• 13mm socket
• Flathead screwdriver
• 11mm wrench or socket
• 19mm wrench
The Cobra is the only 50cc to have the rear wheel damping system. This feature
prevents engine impact shock caused by hard landings. This design allows the
cushioned sprocket to move forward and backwards separately from the wheel.
After each moto, check the 4 rubber dampers, spacers and bolts for fatigue. You
should keep extra rubber dampers in your toolbox (part # PCMU0059). Different
sized sprockets are also available.
Watch for bending and warping of the outside rear damper plate. If it is bent or
warped, the rubber dampers in the sprockets do not last as long as when using a
straight unit. Usually you can straighten the plate with a hammer or just flip it
over.
Changing the rubber dampers:
1. Remove the four bolts with the 11mm wrench
2. Take the backing plate off
3. Observe the four rubber dampers, and pull the sprocket upward to remove it.
Figure 29
1. Pop the four rubber dampers out of
the sprocket.
2. Push the rubber dampers into the
sprocket.
3. Place the sprocket with rubber
dampers, onto the aluminum studs.
4. Place backing plate over the dampers
and sprocket.
5. Insert the 11mm bolts into the holes
and tighten to 18 ft-lb (24 Nm).