I bought the Cylinder Works 474 big bore kit with new crank. It had a brand new Uni air filter, new valve seals, and new intake valves. I took it trail riding for a day and took it easy on it and then went to the dunes in OK for a weekend. I spent most of my time following my son on his LT80 so I wasn't beating the thing all weekend. I noticed it was smoking and using oil so I took it apart and found that the rings are shot. What would cause this? Can I buy new rings? I can't seem to find any online. The piston and cylinder still look fine.