I have an 84 atc 200 and it has a loud clunking noise coming from the motor when you turn it over with the electric starter. It doesn't start at all with the recoil. It sounds like its coming from the top of the engine. I just put in new piston so I dont think that's it. I'm thinking maybe a bad cam. does anyone know what would happen if you had a bad cam. Any help appreciated.
Thanks

 

Have you checked the timing?

 

Yes I did check the timing and it's good.