I just perchused a new FMF powercore 4 for XR 100 and i was just wondering if the new exhaust makes a differece in power from the stock system

 

Not much experience on the XR series, but any aftermarket pipe should increase power and make your powerband a little more useable. Buying the pipe first and asking second is kind of a backwards way to do it though.[img]i/expressions/face-icon-small-smile.gif[/img][img]i/expressions/face-icon-small-wink.gif[/img]

Welcome to the forums.

 

Yea i know [img]i/expressions/face-icon-small-tongue.gif[/img], thanks