(Cblast @ Aug. 09 2007,02:26) You could always adjust the chain and see if that solves the problem.
+1(GSXcite @ Aug. 09 2007,07:45) When you push up on the chain midway from the front sprocket , you should be able to push up about 3/4 ". If your bike is jumpy, you may have tight spots in your chain, or it just needs to be cleaned and lubricated. How many miles on your chain?
I do mine once a season. Your chain might need adjusted, but a guarantee the rubbers will make a difference. I think there like 30 bucks a set. Lube them up with wd40 when you put them in or you will never get the hub back on the wheel!(kennym4 @ Aug. 10 2007,05:26) How often do the cush rubber's need to be changed ?