Hello all. I have a 2010 Teryx Sport with about 112 hours. It has a MSD CDI box, EPI Duner Clutch kit, and a Quad Boss After Market belt. 60% of my riding is at the sand dunes, and I have a full set of paddles. Every 2 hours or so I have to add 1/4-1/3 quart of oil. I change the oil & filter after every dune trip, and after about 10 hours of regular riding. I use 105 octane fuel at the dunes, and premium on regular rides. There is no smoke, no oil in the exhaust, no visible oil leaks, and no oil in the air filter. At wide open throttle there is a "knock" that I think may be piston slap. Any suggestions? If the motor is going, I am going to rebuild with the 916cc MUZZY's kit. Thanks for your help and suggestions!!