Dirtbike claims is makes 34HP at the rear wheel, dirtrider claims the same. MXA claims it makes 32.6 at 13,200 RPM. These are just references and can't claim they are 100% accurate. I did find it was interesting that it was above 30 hp for 2000 rpm in mxa article was the only bike capable of this, with the YZ being the closest to match. It was an interesting article in mxa to say the least but it was a dyno run only good for that day at best.
I have some interesting dyno info-depending on which scale use for hp it can vary by 2hp every 40.Dynojet dynos have the ability to show DIN/SAE/EURO/STD and uncorrected so all the dynos we see could be the truth or not and we cant be sure.Junkie if you look on the members gallery i have dynos from the 00 and 01 125sx ,the 02 from what i hear on the dyno look almost identical to the 01-maybe a smidgin more bottom end.