I have an 89 bayou 300 and I noticed today the starter isn't turning the motor over like it should. Every now and then I will hear it turn the motor over and try to start. So I took the cover off and bit the start button and could see the chain turning but the motor wasn't all the time so I put it back together and tried the pull start and it would turn the motor over but its cold blooded and takes a while to start this way. Any clue what happen with the starter and how to fix it?¿