Hi, I have a 2008 prowler 650 XT and I ride it I ride it often, and lately after about 15-20 minutes of riding the engine starts a "bucking" motion. As if I were pressing and letting go of the gas pedel, even at a steady speed. Also, since I got the prower (I bought it new) the speedometer hasn't worked. Now when the bucking problem begins the speedo starts to move but it dose't give a right reading. I could be going 20-25 MPH but it tells me I'm going 80MPH. :wtf1:I don't understand what is causing this, any suggestions?