Tuning help need to borrow

[Crofty]

I have had my bike on the dyno and found a flat spot at 6000rpm, actually it turned out to be more like would not rev past there.
Ran out of time on the day but b4 I left the dyno guy said it looked to be ignition.
So took bike home and decided to put gpz cams in for now and looked at the timing. Found one pick up coil of the dyna s to be off to the other so realigned statically. Also timed engine with a strobe light and found I had managed to set it too advanced.
Straight away it now revs past 6000, took it for a test ride and easily got to into low 3 figures (private road and all that). It still has a stutter at 6000 put pulls through it and seems to clear once above, roads did not seem long enough to be able to rest fully.
Now my question is do you think the dyno guy can now tune the flat spot out and the reluctance to rev before was just timing too advanced and the pick up off stacking up to restrict revs or is the dyna s faulty and missing at 6000 (though I cant see it getting better above which it now seems to).
Anyone got a spare Dyna for a GPZ750 I could borrow to isolate the problem?
Crofty

[z1bman]

surely the guy who did the dyno test could have adjusted the ignition timing it would have only took him 5 minutes. where did you have the dyno test done?

[Crofty]

Z1Bman,
Yes he could, we just had a limited amount of time. I had to be back in York to take my son somewhere.
He had already balanced the carbs and done a jet change before I started to pace up and down looking anxious.
He knew I could change the cams and check ignition thereby saving me some dough.
I am using Dynobike
http://dynobike.co.uk/
in Malton.
Getting it back to him as soon as he can fit it in.
Any ideas on the stuttering before the power cuts in?
Crofty

[z1bman]

the best thing is to allow yourself more time next time you book an appointment. if you have corrected everything the guy suspected was wrong it should need some fine tuning on the carburation as altering the valve lift as you have done with changing the cams + ignition timing will greatly affect how the fuel is burned

[Crofty]

Your right, the first appointment was just meant to be a carb set up so I could get some miles on running a healthy fuel/air ratio.
Having not given the bike a proper shakedown I had not found the problem at 6000rpm and we ran out of time trying to fix that.
Might leave it with him next time.