hi people, im new to the forum so ill make it snappy, i have just bought a brand new xr125, already took the mirrors off to giv it a more MTX look, i want to make it faster, now i heard de restricting 4 strokes is stupid cause it wrecks them, i would like to know if theres a better exhaust system, or anything, advice on how to de restrict it, anything to make this badboy faster

regards andy