engine stops after 2 seconds

[B-12]

Buddy has a Busa ,which starts normal.

After 2 seconds engine turns of ?????

Can be restarted , after 2 sec off again

Its a streetfighter and the cockpit is removed , electrical minimum ,so no chance to read out failure codes.
Any hints ?

 

[delbert]

I know you shouldnt do this , but does it stay running if you keep the starter pressed ?

 

[PADEROLIS]

Has he tried using the idle advance? Maybe the engine is too cold and needs to warm up first.

 

[Lucid]

Has he done any work to it lately? Vacuum? Could also be fuel related, the pump primes and sends fuel to the injectors, then once the motor starts and burns all that fuel, it dies.