Yes i screwed in the screw tight then loosened it a1/8 back then locked the nut and ajusted the freeplay at handle bar . I get up to 7-8 thousand revs bfore it happens . Today im gna disconnect the clutch cable and drive the bike if it happens agsin i guess its not the cable and time to open the clutch up to inspect plates springs etc

This mite sound stupid bit dismorning i went to take the fazer for a spin and checked the tyres and the rear tyre was very soft . So i put correct pressure in it and went and there was no slippin at all the bike drove really well

No im guessin that the slipping i felt bfore when drivin the bike was the rear tyre soft and the back wheel spinning in side ???

I cant belive that .. .

The tyre was just low on grip giving some mild wheelspin. thats all.

It can't slip on the bead. That would cause total deflation.