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Carb tuning with all original brass!

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DomP:
Following on from my deleted thread I have been fiddling (for want of a better word) with my carb tuning.  Carbs have been balanced but are still a little unstable but as good as I could get with a Morgan carbtune.  I get a good rev drop and stumbling when seating each pilot air screw so that suggests the pilot circuit is clear I believe?  When warmed up after a 20 minute ride the revs are still a little unstable and im still noticing a flat spot and it struggling to raise the revs from 2500 up to 3500, after that it is very much happy to rev which is where it is most used really, its just awkward at junctions and in traffic.

Is this still just a case of me adjusting the air screw from the 1.5 turns out im using?

K2-K6:
Did you get the advance springs sorted out (thought it was in the "infamous" thread) yet.

Some crude analysis may help initially. Go to 2 turns out airscrew and judge if better or worse than now.

DomP:
No, not managed to sort the springs yet, cant find any, would giving them a slight stretch help?

K2-K6:

--- Quote from: DomP on August 14, 2026, 06:47:41 PM ---No, not managed to sort the springs yet, cant find any, would giving them a slight stretch help?

--- End quote ---

Likely yes, it would help to stretch them as it should be most prominent in this range if they're too tight.

DomP:
I wouldn't be at all surprised if this is some of the issue, one is has a few coils less than the other

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