Kevdtr125

I got a dtr 125 on a 2003 plate and its of the clock 85 on straghts up hill gets about 75-80 + dwn hill my mate followed in his golf had she reached 100 sooo its rapid but i wana 180 bore aswell to give it that extra power even tho i dnt realy need it because its frows me of the back already but iff u want to make it stupidly fast fit a yamaha 2strok yz 250 in