I curently own a 00 XR650r with all of the uncorking parts, pluss an E-series exhaust. I will be getting a 520EXC in the future. Has any one rode both of these bikes? If so how does the overall power compare from the 650r to the 520EXC? I know the 650 weighs alot more but I REALY like the power of the 650r, especioly the instant responce and torque of the engine.