set flop to 80 thou.
Amal now recommend setting by fuel level, not float height.
http://amalcarb.co.uk/optimising-mark-1-concentric-fuel-levels
We'll someone is bound to ask so I might as well do it now.
"As the float bowl is at an angle is that at the front, middle or back?"
As of 21 Oct 1989, after a lengthy and detailed reverse engineering exercise, I determined the fuel level is measured, IMO mid way, which is inline/parallel with the spray tube/needle jet. The fuel should be 6 to 8/32 below the BODY of carb. That places the fuel level within the machined .107" bore of the needle jet (which is within the carb body, not the bowl). The fuel should be set according to the bottom of the meniscus as seen in the sighting tubing. Since then, I've never had any discussions or convincing evidence to change my method.
As of 21 Oct 1989, after a lengthy and detailed reverse engineering exercise, I determined the fuel level is measured, IMO mid way, which is inline/parallel with the spray tube/needle jet. The fuel should be 6 to 8/32 below the BODY of carb. That places the fuel level within the machined .107" bore of the needle jet (which is within the carb body, not the bowl). The fuel should be set according to the bottom of the meniscus as seen in the sighting tubing.
Would that be the same for Downdraught heads on pre-Commandos like my Dommie as the angle is steeper than the Commando.