i just bought a 02 zr800efi c/c and was wondering what kind of aftermarket parts were worth installing on this sled. I am not looking for top speed just 0 to 100 in half a heartbeat. The sled is trail picked(144) and it has a d&d helix. I do not know if the weights have been changed in the clutch but it does have a black primary and grey secondary. thank you for your input.