[hornet911]

I am making my thesis about motorcycle injection.

Now I would like to measure the difference in power outlet WITH AND WITHOUT the valves in the intake and exhaust.

Are there people that had their bikes horsepower measured before they removed all these valves and after? With modification of injection (powercommander) or without?

[smoothrideronli]

What valves are you referring to? I assume you are not talking about intake and exhaust valves.

[Ol' Gravy Leg]

I'll go out on a limb and say that the power goes down with removal of all valves.

[hornet911]

Originally Posted by smoothrideronli

What valves are you referring to? I assume you are not talking about intake and exhaust valves.

Nope, valves like the exup valve, or the HISS ...