The 700 engine has a loud valve-train. Best way to describe it is that it sounds like a sewing machine. It's pretty loud, you definitely hear it over the stock exhaust. It's loud enough that it can sound abnormal if you aren't used to itHi !! I bought a 2006 raptor 700r in great shape but is it normAl that the motor make noise ?!? that's not excessive but i always ear the motor at the idle and at low rpm.