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[Bonnevillesmith]

I have a BSA B31 fitted with a 376/29 1" Monoblock. What ever I do I cannot turn the idle speed down. The slide is at the bottom and is a good fit/not worn. I have also checked for air leaks at the manifold and there are none. Any ideas?

[DUFFEL]

Hi Bonnevillesmith You could try a slide with a smaller cutter way Is the inch bore carb correct for that model I would have thought an 1.1/16 bore ??

[Beezabryan]

1" Monobloc 376, see this - http://amalcarb.co.uk/carbspec/carburet ... s/id/4662/

[Bonnevillesmith]

Thanks everybody, may give a new slide a go, if not new Concentric