I've got the 38mm Amal from lancer and put it on earlier this week.  It definitely has more power, but I can tell from the black smoke when I roll the throttle at idle (and by the fact that the plug gets so carbon fouled at idle that I have to go full throttle between stop signs to "clean" the plug a bit or it will attempt to die on me when I go to idle again) that it is running very rich...

I have the sportster muff installed and a K&N drop in air filter.  

So, I know there are a thousand postings related to adjusting and tuning the original, but for those that have the Amal, does anyone have any suggestions for me.  

Mods/adjustments to the the carb? (I don't know how on this carb)

Mods/adjustments to the set up I have?  

I don't have tons of money (who does?), so I would prefer to keep the sportster and drop in, but is there anything else that I could be doing that I am not?


Thanks for your help!

I've just dug out an old 38mm Amal and it has two screws on the right hand side, one angled upward (idle speed) and one going straight in (fuel mix) from what You say the fuel screw needs to go in a little.

Clive W