How do you increase hp and RPM?

Answer 1

That depends a lot on how much you want to increase it by and why. Typically you will gain a few hp by changing the air filters and exhausts to aftermarket sports versions that let the engine breathe more easily. This usually makes the bike louder and is as much as you want to do unless you have someone that really knows what to do. If you still want more hp then you can put a bigger piston in with a big bore kit and put varying replacement race camshafts in. For all but a mild increase in the cam you also need to check valve clearance on the piston and usually you also need stronger valve springs and hardened cam followers. Typically he higher the hp the less reliable the engine is. As you increase the hp with changed cams you also usually need to rev the engine more so will also need to balance the crankshaft, then put stronger valve springs then stronger con rods as you increase the revs and hp.