From:Chris e-mail:chris@
Subject:RE: RE: bad running when hot Date:Sun Oct 26 11:22:50 2014
Response to:5397
many thanks for the reply I did try that but no better, I just advanced the
ignition timing past the original setting and it seems better but when I go to
rev it a huge flat spot when hot yet perfect when cold. Going down the pub
drown my sorrows.


just finished a major rebuild on 22 Ace start from cold runs perfect and
smooth as it get hot say 5 minutes starts to misfire when you open the
throttle it's flat won't pick up. The mag has been rebuilt by a very well
respected company,has new HT leads, anyone else suffered the same
problem ?

Do you take hot air from the exhaust manifold into the bottom of the carb?
Modern petrol don't like it. Had that problem on my 1923 and my friends
1921. We tok that away.