While my Amal is not new. I believe it is very old. Anyway it leaked all the time. I lapped the float needle and problem solved.
A very small portion of valve grind paste and a couple of revolutions and back and forth. I got a very small, but very bright ring all the way around the needle.
I like those rigid tele fork models...I've had a few over the years, M20,21 and M33...After girders the tele forks were a vast improvement and made the rigid bike something that could be hacked about in comfort...Ian...
A member of the old bike club I'm in has a tele M21. Following her on a run riding my Sportster she was pretty much keeping up to legal limits on give & take roads, something I certainly couldn't do on my girder model.