Got my old 488 out today it used to be my brothers this was my first time ever riding it. I bogged very bad on the bottom end and would only rap up to 6500_7000 rpm and then fade a few seconds later back to 6000 ? Any ideas where to start as far as jetting and carburetion? Running 6500_8500 feet. On a sad note I did manage to to over a blind hill and off a 40` drop and busted the shock mount and trailing arm bolt off in the bulk head and bent it. I was planning to use this motor for a lightweight back up sled for me and a sled for the wife but I guess the build will start early!! Time to tear it apart will be dropping all unnecessary weight and making parts from chromoly and carbon fiber. I'll start a build thread when I get it apart and decide for sure what direction I'm going with it.