[dj dunzie]

Your "powerband" guys is your entire rpm range. There is no such thing as a "powerband" that kicks in at a certain rpm. It is a description of the power produced at EVERY rpm range from idle to peak. The graph a dyno prints out a VISUAL of your entire powerband.

Also, changing gearing doesn't alter where your bike makes power in the rev range, it changes how the power is translated to the rear wheel. It might FEEL like your engine is more potent earlier on, but truthfully it's still the same... powerband.

Just a l'il pet peeve of mine... and I knew what you were trying to say...

Cheers.

 

[dj dunzie]

Yeah, CDN is bang on...

Most aftermarket exhaust (full system) manufacturers openly admit that in order to get the most top end peak power gains, they have to design a pipe that sacrifices SOME very low-end power, where racers never need to be anyway. We're talking 5,000 rpm and under generally, but yeah, that sounds like the range this fella was interested in boosting...