More than that Steve, your original dyno graph says 360 and a bit, Imran tells me its now doing 378. (although its probably back down to 360 now
).
Marlie, as Steve said, it alters the response of the throttle from progressive to linear I believe. I might try mine without (out of interest) to see the difference and if I prefer the progressive feel of the throttle. I'll let you know what difference it makes.