(08 Teryx) This thing is being a headache. The front cylinder has 50 psi and the rear has 70 psi (all stock machine). The rear plug is black after 5 miles and the front looks like brand new. I took the carbs apart and put a bigger main in the front, and put two new plugs in and got the same result exept it ran worse. Im at 1100 feet. It is also cutting out around 45mph and acts like its not getting fuel. I rebuilt the fuel pump, replaced the fuel filter and blew through all the the fuel lines, it didnt make a diffrence. there seemed to be a little bit of oil in the air box so I cleaned it an pulled the breather hose off and plugged the hole. It has great bottom end up to 15mph and then it seems to take for ever to get to speed. It has a new primary and secondary clutch and belt. It didnt run like this when it was new. please help! thanks