Spot on, and the Seat of the Pants Dyno can be even more deceptive with a 2 Stroke.Stayt`ie wrote:mate, never underestimate the information gathered from a dyno, sure, thay all read different, but,, always use the same dyno and work with what it tells ya,, sometimes changes to your machine "feel" right, dyno readings will confirm, ,, for example, i made a new exhaust system and ran it at the drags, thought it was better by the sound and feel , ran it up on the dyno, had made horsepower where i didnt want it, and overall had lost heaps up in the rev range,, i binned that pipe, , but without the dyno readings i would have kept using it, mistakingly thinking it was better, ,,,
If the changes you make lead to a narrowing of the powerband, it simply feel like more power and it usually isn't.
You simply have less power off pipe and a sudden rush of power when you come on pipe, but it does not mean you have gained power.
Get a baseline curve and go from there.
Pete