400ex hotcams stage 2

[6858-400ex]

how much top speed will i gain

[94F450SD]

none.youre only gonna go as fast as the rev limiter will let you go unless you change sprockets.a cam is only gonna get you up to speed faster.but without the correct supporting mods it will actually slow you down

[hrc]

Originally posted by 94F450SD
none.youre only gonna go as fast as the rev limiter will let you go unless you change sprockets.a cam is only gonna get you up to speed faster.but without the correct supporting mods it will actually slow you down

What supporting mods do you need?

[94F450SD]

air filter,airbox mods,exhaust,jetting,depending on the cam specs and manufacturers recomendations you may need stronger valve springs.

[GPracer2500]

High lift, high duration cams often need higher than stock compression as well. Lots of lift and duration bleeds off dynamic compression (i.e. when the valves stay open longer some of the air volume that would've been trapped in the cylinder has time to escape).

In one particular instance (this was a sportbike) I've seen an aftermarket cam LOOSE 10% over the stock cam everywhere in the RPM range. This was confirmed on a dyno. The problem was that the cam was too aggressive to work with stock compression.

[94F450SD]

forgot about the compression/piston parts.

[6858-400ex]

i have whats in the sig

[TRX23rider]

you would be better off with the stage 1 cam and a 11:1 piston(std. bore).