Engine starts from cold, will not start again after a few minutes running, engine not up to temperature? any ideas?

 

Air leak?

Try taking ain't box off and give metering head a poke while cranking.... If it starts up its obvious you was not getting fuel..... Only thing is could still be a number of things.... Fucked metering head, air leak or could even be too much fuel by a leaky cold start valve... Very diffcult to fix unless you have a systematic approach trying ONE thing at a time and noting results... Are there any other running issues with it?

Good luck

 

when you say wont start, do you mean wont even turn over or will turn over but not start?