Does anybody know about motor cycle rear hubs with rubber torque
dampers?

Make model and parts numbers.

Paul Lamar


Paul, just about any chain drive bike 600cc and up uses the dampers. My
current ride a Yamaha 1000 has a rear hub with the six dampers and paddles
style. There is a needle bearing within the damper to float the sprocket
holder side. This has 6 blades or " paddles" which go into the center slot
of the rubber parts you have pictured. The pie shaped rubber fits into a
similar recess cast into the wheel. The Yamaha R1 uses this system and the
FZ1 a similar current model. These bikes are rated at about 140 hp - 160hp.
Usually a bit less in actual tests. The sprocket portion weighs about 3
pounds WITHOUT the sprocket. You would need to machine the wheel side part.
It is built right into the wheel to save weight. I don't have part numbers
or prices but lots of these could be had from motorcycle salvage yards. Any
1000cc Japanese bike built since about 1975 will have one. Another possible
system would be the ball and ramp system used on shaft drive bikes. It is
heavier than the rubber ones though.

Bill Jepson



We need a torque damper that works for the gear box. These work with high torque.

Tracy made the mistake of enclosing the rubber in a metal container with
no room for bulging. Might as well as made it solid as contained rubber
does not flex any more than hydraulic fluid  would deflect.

Paul Lamar

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