The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Amal, Carburation, Fuel => Topic started by: derek taylor on 04.05. 2015 20:03

Title: pinking gold flash
Post by: derek taylor on 04.05. 2015 20:03

had this before and still not fixed it, but what i'v noticed is that it seems ok up to a quater throttle then after that right up to full throttle (putting laod on) it pinks, also when you put the choke on it seems to help.
just lifted the needle up a notch, it's now 4th from top but not had chance to try it yet.
plugs are a gold colour?

Title: Re: pinking gold flash
Post by: muskrat on 05.05. 2015 11:56

G'day Derek. Try retarding the timing a tad. If you have it set for 5/16 back it off to 9/32. Or try a higher octane fuel.
Cheers

Title: Re: pinking gold flash
Post by: bsa-bill on 05.05. 2015 13:46

are you using any lead additive Derek, if not try one (I use Castrol valve master plus) takes not a lot and adds an octane boost

Title: Re: pinking gold flash
Post by: Triton Thrasher on 05.05. 2015 18:11

Tune your mixture according to the well-publicised Amal procedure, doing everything in the correct order.

For instance, moving the needle before getting the right main jet is doing it in the wrong order.