Mk. 2 Amals

Sorry Phil can’t help you but thought a response might be at least appreciated.  

I have the Amals on my Combat at standard settings and still have not got the setup right yet. Tired of clearing the idle circuit. With the work I’ve done in the last year only ran a couple of tanks through them. I am likely to switch carbs from the originals down the line. 

Hello Phil, I've just added to the thread 'Starting a Fastback' that may be of help.

I have run Amal Mk2's on two different Commandos quite successfully both in single carb and twin carb formats. I believe I did copy the original Mk1 jet sizes etc. But as Mark says it's very important not to open the throttle when using the choke on an Amal Mk2 carb when starting. I seem to remember having to fit a smaller size of jet in the choke system, the carbs seem to come fitted with a No.50 jet. In all cases the engines started and ran better after reducing the size of this jet (in my experience). I'm not sure, but think I used either a No.25 or 35 for the choke jet.

Alan.

For what its worth I'm running a pair of 34mm Mk2 Amals on my 850. I changed the pilot jets to  No.20, the main jets to either No.260 or 280 and as Alan changed the choke jets to No.35.

Dave 

I have used 32mm mk2 Amal’s for many years. I have a1970 roadster with 30 mm inlet ports and breathing through a k&n air filter roughly half the width of the standard filter. Settings as follows,main jets 240. Needle jets .106. Pilot jets 25. Cold start jets 50. Slide 3. Needle 2A1 position 3. When cold starting i normally switch on fuel and choke then turn the engine over two or three times with ignition off, turn on ignition open throttle one third usually goes first time.If having trouble starting when hot try using the choke and one third throttle 

l