Hey guys i just bought an 02 zx6r last week for a trackbike. Runs and idles good below 6k but if i twist her wide open it takes probably 30 seconds to go from 6k to 10k in first gear and seems like forever to go to redline, it doesnt pull hard at all, it doesnt miss or hesitate it just accelerates very very slowly. This bike doesn't have the ram air tubes, just has the scoops coming out of the frame and thats it. But i didnt think that would affect anything until over about 60mph, and im only in first gear. And also it has the factory headers but the p.o. has a cut down aftermarket silencer on it. Could either of these cause my problem?? And if not what else should i check?