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Title: Carb Jetting 1953 Golden Flash
Post by: Steve C15 on 01 Mar, 2021, 08:30

Hi

I have started a rebuild of a 1963 BSA Golden Flash 650.

It appears to have had a new carb fitted during a brevious restoration.

it is an Amal 626 R300.

Can anyone tell me which jet sizes would be a good starting point for this carb to suit the engine please ?

Regards Steve

Title: Re: Carb Jetting 1953 Golden Flash
Post by: bikerbob on 01 Mar, 2021, 08:57

That is a concentric carb, the correct carb for your bike according to the Amal catalogue is a monobloc 389/45. bore 1 1/8" main jet 250 pilot jet 30 needle jet106 needle position 3 throttle valve 389/06035.

Title: Re: Carb Jetting 1953 Golden Flash
Post by: Bess on 01 Mar, 2021, 10:13

Hi,
If you wish to keep the Carb you mentioned give 'Amal technical' a call, they are very helpful unfortunately you might find the carb you have is unsuitable.

http://amalcarb.co.uk/contacts/

Best wishes...

Title: Re: Carb Jetting 1953 Golden Flash
Post by: Steve C15 on 01 Mar, 2021, 16:18

Thanks for the info guys.

I thought this carb looked a little too new for the bike.

Regards Steve

BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: Steve C15 on 01 Mar, 2021, 08:30