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As pointed out to me by a poster on my original thread, so of the "jerkiness" (besides a reallllllllly worn out chain!) could be the cush-drive. Thanks to FeHorse for telling me what the heck it is!

So my question is: how often have any of you ever replaced this part? and at what milage?

My bike's got 27k on it.





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Like it's been said, no set interval. Mine lasted until about 30.000 miles. I replaced it with a Thunderbird rubber, and got a bit tighter fit than stock. There should be no play with the cush drive rubber. If there is, it could cause the chain to stretch. The Tbird part # is T2012211.



Replaced both mine with the Tbird ones and have not had anymore concerns with them. They last that long.

I replaced Cinnamon Girl's with a Tbird Cush rubber on December 6, 2007 with 22,785 on the odometer. She now has 77,218.

I replaced Vera Lynn's with a Tbird Cush rubber April 11, 2007 56,900 on the odometer. She now has 90,400.

I had replaced Vera's oem cush drive with another worthless oem cush drive March 2nd, 2005. Mileage record for that is at home.