Originally Posted by deejay_xr
Yeah, the numbers the interwebs mention are completely stock too, so header & muffler.
I find it hard to believe that a high comp piston and aftermarket cam will make less power with the steel header than the original setup would have.
What's going on here fellas ?
Can anyone chime in on whether the original numbers were THAT much exagerated or not?
I can promise you a stock XR will NOT make anywhere near 43hp stock,
see this reply
And remember there are a LOT of dynos that are a little positive when reading power..
besides, its not the power it makes, its how you use it :)
Progress is far more interesting compared to peakpower.
also see these