Carb Jetting 1953 Golden Flash

[Steve C15]

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

[bikerbob]

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.

[Bess]

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...

[Steve C15]

Thanks for the info guys.

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

Regards Steve