Hello all I have a 2010 450 that burns oil. Only has 32 hours It (not a very happy camper) must be rings or valve seals. Puffs when under cracking of the throttle. Now to my question. I'm going to put a new piston in and was looking at the 13 to 1 cosworth set up. Any thoughts on the reliability of cosworth. I don't want to go any higher on the compression so I don't have to run straight race fuel. Or just oem or wiesco? Cams? I don't really need any more power as I ride mostly mx. Looking for the hot setup. Any insight would be appreciated.