I have a VT2 for about a year now and I keep on having problems with the drivetrain. I already changed a BB (but this happens you know) I am 240lb. But now when I climb and have to put any pressure on the pedals all of a sudden there is no more resistance on the pedals and I just spin forward freely as there is a bad inner cassette. Some times also the chain jumps for the middle sprocket over the small sprocket all the way to the frame. I have whipped out pretty bed several times. If anyone knows what is going on please help me out……………as of right now I cannot go up anything steep.