Out of ideas and ready to break!

[dalby1988]

don't rule out the plugs they foul up so easy, you have to be very carefull with these

[Neosophist]

14.46 isn't bad.. a little high but its usually when its LOW that you get problems.

I'll go with carb problems.

http://www.factorypro.com/tech_tuning_p ... gines.html" onclick="window.open(this.href);return false;

Have a quick read through that.. see if any of it can be applied to your bike.

[CharlieK]

Thanks, Neosophist fascinating article, a combination of overly rich pilot screws and too low float height could cause the problems that I'm seeing according to that but I've got 4.6mm (Whatever the recommended float heights are) set and 2.25 turns on the pilot screws, i don't think a small variation from these settings could cause the dreadful bogging down Ive got going on.

[arsey30]

If the carb balance is worse after adjustment it was done wrong, so that's the first thing to sort out.
He didn't try to set them as NC35, where the screws set pairs of carbs rather than the nc30 where they set individual ones, I suppose.
You can balance them close by sliding a plastic straw past the butterfly of each carb, and set them the same. Set the fixed one first by screwing in the throttle stop and packing out with feeler gauges.

Find which cylinder is faulty.
Warm the engine then stop and let the exhausts cool for a few minutes, then run at tickover and check exhaust temperature to see if 1 is not firing.
Remove each plug lead in turn and rev the engine to see if removing one of them makes no difference, that will be the bad one.
Fit a plug in the disconnected lead when trying this to prevent cdi overloading.

Dave.

[Neosophist]

Good call!

Float height is 6.3mm?

Wont hurt to check what figure you have... and try it without the shims / 2 turns out...

[ChowderV4]

There are plent of carbs on evilbay
so if you can't get it sorted and it isn't electrical the I would get another set and try a different set up