I have a 00' DRZ E with an FMF powercore IV2 slip-on, 165 main jet, needle raised one notch, fuel screw 2 1/2 turns out from bottom, and the airbox snorkel removed. I have added a 13t front sprocket, acerbis handgaurds, kx bend renthals, and reshaped the seat foam. After rejetting, adding the pipe and the 13t sprocket, I raced my brothers 99' YZ250 and beat it right from the bottom to the top. The suspension is a little soft for real aggressive riding, but real nice for tight woods or a long day of riding. As for the extra weight, I am 5"7' 170lbs, and have NEVER had a problem with it. For the amount of DRZ owners out there, the reports of blown seals or leaks are very minimal. Buy one and you'll love it.