NC30 stalling

[emto]

Since balancing my carbs ( using digital vernier calipers) I've developed this annoying problem. Everytime I have to downshift to come to a stop, or, if I have to brake harder than normal, the engine stalls.
The idle is perfectly steady at 1.5K although "hangs" a little around 3K when coming down, otherwise she's running lovely all the way to the redline.

Any ideas out there to solve this, it's really bugging me at this stage.

[CMSMJ1]

Is it only in gear and with the clutch in? Might be dragging slightly?

[Malc]

It seems like in balancing your carbs you've unbalanced them. How did you balance them using the vernier caliper? Balancing carbs (as I understand it) is all about equalising pressures rather than distances.

[randallbass]

as malc has stated, that how i understand it..... do u mean you set the float levels???
it hanging at 3000 before goin back to normal revs is an indication of poorly syncronised carbs or wrongly set pilot screws (to lean) , either readjust these or check pilot (mixture) screws should be 2-1/4 from fully in if its stock intake/exhaust setup
to get around poorly syncronised carbs you can richen up (1/2 turn out) the pilot screws.
cheers Tim

[emto]

Thanks lads,

I suppose I'd have to say I've set the carb butterfly distances without taking equal pressures into account.It's still an improvement over what I had, a completely erratic idle.
My mixture screws are set at 2 turns out. I'm running a 1/2 Ethos system with no other mods. I'll try an extra 1/2 turn out and see if that makes any difference.

[randallbass]

yer try 1/2 turn out before adjusting the butterflys, if its idling fine then they shouldnt be far off, hopefully she just wants a it more fuel :) :)
cheers Tim