I recently added a simonini circuit pipe, malossi air filter and rejetted my Bravo, every thing else is stock. Top speed is definitely up, to around 30-35 flat (given enough space and time, it takes awhile but it will get there) and I have come close to 40 downhill. (all speeds as indicated by speedometer, so not very accurate) My problem however is that acceleration is non-existent. From a stand still the bike will not pull me up my driveway which is a very slight up slope. I feel the motor is running as it should but the clutch is the problem? I cannot set the idle speed low enough to get the rear wheel to not spin yet it feels like the clutch is not grabbing very well during acceleration. I can hear the clutch shoes rubbing while it idles. Also while standing next to the bike and giving it gas, it still takes off very slowly with a lot of clutch slipping, so I know its not just my weight problem. Any thoughts....