sorry to say roketas are junk ,sold them for awile but had way to many problems,go up into yamaha or other brand name bike were mods count ,spend your time riding not fixing your bike
i ride with 5 guys that have honda 450rs and i can say my yfz is not only faster straigtline but mutch better on any track situation stock for stock theres no comparison,as for raptors very fast bikes but not as fast as yfz 450s stock for stock.