ok i got a 2003 rincon i am running 0w40 oil. the tempature is -20c i turn on the key wait a minut of so. i crank the engine over it sounds like its having a hard time, it turns over 3-4 times and lock up solid, can't even pull it over with the recoil. HMM whats wong????? well if this sound like your bike i know whats wrong. the started jack shaft has a burr on the engine case beside the ring gear. to fix this ya gotta remove the air box, recoil and back cover of the motor. there is a shaft with 2 gears on it pull it out and look where is goes into the engine case there will be a little burr on the alumin case removeit with sand paper. and reassemble.