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I have a raptor 660 with an HMF full system jetting and intake. Today i got smoke by stock yfz 450. is this supposed to be? it was a drag race across a field and was not even close. what is up?

Do you have stock sprockets? Did you buy it used or new?FullBore660rLE said:alright starting to think something might be wrong with my raptor. it seems to fall flat in high rpms..