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Motorcycle Discussions => British Bikes => Topic started by: CarlHolm on September 06, 2017, 01:22:21 PM

Title: Amal concentric settings on BSA M20
Post by: CarlHolm on September 06, 2017, 01:22:21 PM

Hi,

I have a 1943 BSA M20 and a previous owner has fitted an Amal 626 concentric carb to replace the original. Does anyone know what settings would be correct for this carb on an M20? Has anyone fitted a 626 conentric to the same bike?

Cheers,

Carl

Title: Re: Amal concentric settings on BSA M20
Post by: TGR90B on September 06, 2017, 01:35:52 PM

A Monobloc on later M20s would have been 1" bore with no 5 slide, 240 main jet & needle position 3. This would give you a starting guide.