Print Page - Mk1 Concentric on a B31?

Title: Mk1 Concentric on a B31?
Post by: gmann1340 on 09 Feb, 2018, 16:05

Has anyone put a MK1 Concentric ( Premier? ) on a B31? If so could you give me the spec and your thoughts? Thanks

Title: Re: Mk1 Concentric on a B31?
Post by: ANDY HIGHAM on 10 Feb, 2018, 21:29

I don't know about a concentric but I fitted a Mikuni TM flat slide carb to a 400cc B31.
Starting was easy, I could kick start it wearing thin soled trainers. A proper starter system instead of a finger soaked in petrol, It idled perfectly, the throttle response was instantaneous with no fluffing or stumbling and the carburation was clean at WOT (86MPH in top gear)
When Amal make a carb as good as a Mikuni I will fit one

Title: Re: Mk1 Concentric on a B31?
Post by: antonis643 on 29 May, 2018, 15:22

what about installing the amal monobloc 389 1 3/16 on a b31 1953 model with t 140 piston? Has anyone done this and any advice on jet settings etc as i am about to order a new on?

BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: gmann1340 on 09 Feb, 2018, 16:05