Ok, so I just got my warrior back from the shop. It was rebuilt, with new piston and rings, gaskets, valves, a new starter and starter clutch, and a couple of other things including a carb rebuild. Yesterday when i went to pick it up it started fine, but this morning I tried to start but it wouldnt. I tried the choke, starter fluid, but still nothing. Finally I bump started it and it ran. I rode for a while, cut it off, and it started fine. Later tonight after it cooled down, it did the same as in the morning. Please someone help me figure out what this is. Any help greatly appreciated. Oh yeah, I did correctly break the engine in.

 

My guess would be to check all your grounds and make sure they have good connection.

That was a good day of riding then. You are suppose to run it at less than half throttle with easy gear shifts for at least ten hours to break in a rebuilt engine.