Only thing I've done to my 600RR is install frame sliders! I've totally rebuilt my NSR race bike this season... After running a XR100 motor in my NSR frame for the past 2yrs, I thought I would add a few parts.. -Takegawa 124cc stage 3 kit, Takegawa 28mm carb kit, custom made alum swingarm, NSF undertail exhaust, adjusted emulator kit that 35Motorsports did last year, custom subframe to allow for undertail exhaust and NSF tail section, etc.. Here is my website where I'm going to share my build for the 2010 season.. check it out.. I'll up date on here and on my site what I've been doing and have done. http://www.teamquazzymoto.com/Bike%20Builds!.htm here are a few pics for those that are too lazy to click on the link.. Start of the build.. Plumed up the breather tubes and installed the massive carb! Stock NSF exhaust mounted... for now.. if the Jemco doesn't come in time for the first race, then I might mount up my old custom exhaust?? My wife wanting to take a hammer to the bike... after she found out how much I spent on it, and that we will be eatting nothing but ramen noodles for the next few months! HAHA Good thing she picked up the rubber mallet! Tail mounted..