I reacently had Looney Tuned dual exhaust,ScaryFast power now, and K&N filter with adapter put on and before all this it would top out at about 53 with just the CDI box and magic powerbox, but i have only been able to get it to 50 on the same road after the other stuff was put on, what could be the problem, I figure it didn't get jetted good of the stock fuel pump can't handle it.

 

Is it a 450 or 660?

 

660

 

?