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Title: C15 Concentric Carb jet sizes
Post by: Nicky Burgess on 04 Apr, 2023, 09:44

Hi,

I am looking to fit a 22mm Amal concentric carb to my 1960 C15, I know this is a common upgrade but was wondering what jet sizes I would need to use ?

Regards,

Title: Re: C15 Concentric Carb jet sizes
Post by: Spaceman on 04 Apr, 2023, 17:11

A good starting point would be the same settings as per the original 375 Monobloc:

Main jet: 140
Pilot Jet: 25
Throttle Cutaway: 4
Needle Pos: 3
Needle Jet: 0.1055

If it is to be run without an air filter, add at least 10 to main jet size.

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The BSA Workshop => Singles => Topic started by: Nicky Burgess on 04 Apr, 2023, 09:44