yh i think its because of the rollers, get it confirmed and if it is get some rollers il fit them on for ya
the cdi on a 125 revs to 9700 flat out whereas a 200 only revs to 8500rpm so you should thrash a 200 top end as well
might have to look at the jets then, cos i was only hittin 70 tops yesterday, it seemed to splutter anything over that