I recently bought a 2000 prairie 400 4X4. It pull starts on first or second pull and purrs like a kitten. The electric start turns the motor but will not start it. After the motor is good and warm the electric start will start the darn thing. It has a new battery with 230 cca. The valves have been adjusted to service manual specs. I was wondering if starters can get weak or what to check next. I am new to atv ownership and the only mechanic in the area is fresh out school and a polaris guy and he is stumped. Please help, I don't want to have to pull start this beast all year out on the ice.