MXA BUILDS A 44-HORSE KTM 150SX TWO-STROKE & USES ALL OF IT AT THE WORLD TWO-STROKE RACE Oct 9, 2021 You'd be surprised how little we did to build a rocketship KTM 125SX. We got a 150 kit from KTM and help from Mitch Payton (and we left the rest of the bike fairly stock) Read More...