I have no idea what is causing this my dune buggy starts up every time when cold but soon as i take it down a trail 1-2km's she stalls and wont start back up it just turns over.. wait til it cools down and it starts back up!?

 

Check compression! If it's a 4 stroke check valve clearance also,valve clearance could be tightening up as it gets warm causing the problem or if it's a two stroke,excessive piston to cylinder clearance could be causing the rings to loose their seal against the cylinder wall when it gets hot,then when cools back down will run again for awhile..

 

Thanks! but i am just going to sell this chinese made junk, ran into a new problem today and it acts completely dead (just bought a brand new battery) charged it all day put it on and it only had enough power to turn a light on but it starts when i boost it i take the booster off and it dies instantly