I was given a 1997 suzuki 250f four wheeler. It wouldn't start with the electric starter, it would just crank;however it would start and run with a push start but wouldn't idle. After gander mountain serviced it ie changed the plug, oil, and stated they had to losen the valve it ran fine for a few months but now is back to the same old thing. Does anyonehave any ideas, is this a valve problem?

 

Dead battery?