There's a lot of chatter in the sidewinder section of chain case failures, I'm one of them. I also have a 16 Viper and there are 3 other Vipers in our group. These chain case and drive systems are the same basically on the Vipers and Sidewinders. Two of Vipers are close to 9000 miles so it got me thinking.....how many guys have seen the chain case failures with there Vipers? Is this a common problem associated with the Viper platform as well? There seems to be two major issues...1, the upper gear bushing is wearing out and 2, the screw for the roller tensioner is backing out (loosening). Just haven't seen much chatter in the Viper section in regards to these problems so I thought I would put this out there.