I have not put my bike on a dyno my bike is primarily for show and fun not a race bike, but Iv seen the stock torque ratings and horsepower is that at the crank tho? The reason I ask is because I saw a Busa with a turbo and intercooler, valve and head work run 170 at the rear wheel in a contest and thought wow thats low. Now Its a dumb question the published rating, is that crank or wheel? I have a 2004 f4i motor and trans re geared and has major work and thats tucked into a 2004 Honda 400ex quad frame and im curious what that might do

 

The spec sheets list the indicated horsepower (at the crank).

 

Wow sounds like a crazy ride. A stock 600f4i probably puts down around 92-93 stock at the rear tire. It is impossible to know what your putting down (with major work) but a friend had his head ported and shave, cam work, full race exhaust, stacks and a k+n filter and he pulled down 109 at the rear wheel which is a 20 percent increase. He then had the computer custom programmed and switched to synthetic oil and layed down 113, which is huge...

 

My 04 F4i dyno'd at 94 max horse

Charts are here: http://www.biperformance.ca/dyno.htm