Want to pull some extra power out of my 650R,if possible all-round. The bike: - XR650R ' 2000 - Supermotard - Monnier tank with custom graphics/seat. - Brembo race brakes with Braking Wave rotors - standard engine - CRD headers + Leo Vince X3 can (open) - Air box mod,No Toil filter,no backfire screen - Mikuni TM40 The plan : - mount a HRC piston,I have a new 680 kit but I don't gone use it because of the reliability issues ( I use the OEM crank) - clean-up the ports ,intake manifold etc. - bore my Mikuni TM40 to 41mm. The questions: - Hotcams stage 1 or 2 ? - Knibblewhite OS valvekit ? - lighten the flywheel 300gr ? I don't want to lose low-end(if possible gain) but I need extra power in mid and upper rpm's. What's the ticket? the stage 2 cam with OS valves or is a stage 1 cam with standard valves the deal? I know the the stage 1 Hotcam is a "drop in" but what about the stage 2?Any mods to be done?Clearance issues? What about the flywheel? The bike is used on the street as SM. Where can I get the best deals (over there in the USA) for Hotcams and Knibblewhite parts? Anyone?