My sons kdx is running very poorly and it came on suddenly. It will not pull strongly from migrange on will just flatten out and will not rev higher. Almost acts like a governer is on the bike in all gears. Have checked KIPPS and is working at least the valve moves from half throttle on,carb is ok and compression is 103. it is putting out more black sooge out the back also. Has always been a strong runner and very clean. They did use different gas and oil on the riding they did over the weekend but the other KDX ran fine. Any ideas I am stumped???
Scott
Scott