I bought a 1946 BSA M21 with a side car attached a couple of weeks ago.
It has been previously restored but sat unridden in a shed for about 3 years.
I have started the bike and it idles quite well but only if the mixture screw is turned all the way in. Turn the mixture screw out half a turn and the engine stalls.
It is running a type 276 Amal carby which I have dismantled and cleaned and blown out with compressed air but the problem persists.
I will probably buy a new carby but in the mean time does any one have any ideas on how to fix this?
