so the problem happens when i pull the throttle all open and release it, it shuts down straight after the rew. Is this a flaw or normal behavier. i noticed this during dyno tests etc. Its seems to me that its drowning in gasoline or is it something else???

 

Pull your plugs and have a look. Might shed a little light on it. You might want to provide some more info on the problem too. You'll get more responses.

 

Thanks, ill look into the problem in near future when i have the time It hasen´t done it for while at least not while driving etc.

 

It's not going to happen while riding. If the engine is still spinning on closed throttle it'll clear out the rich condition, if that's what it is. BTW, it's not good for an engine to run over 1/2 the redline unloaded.