hey, i just got my 450 out of the shop and i broke it in.... ran 3 tanks of gas in to break it in but any ways every time i ride it now there is a really destinctive taping in the head and im scared shitles!!!!!!! cuz we spent 2,145.00 to get it out ouf the shop, and put my perents in debt! and the only time is does that tapping is when im in 2nd 3rd and 4th so can any one tell me wat that tapping is?

thanks guys!

sounds like its pinging? you could be lean. try running higher octain fuel in it.