4deg is that 4F OR 4C? If its 4c I dont know why it would be iceing .Could be its just way lean. If its 4f you are ether crazy or a tuff man lolhi all,i'm having major problems with carb icing,when it gets to about 4 degrees the bike plays up and its hitting -6 now.my old t140 never suffered so would it be possible to fit amal carbs to my thruxton. thanks.
Carb icing is not a matter of rich or lean - it is moisture in the air that freezes. As a pilot with a carbureted engine I am acutely aware of icing conditions. The temperature drop across a venturi can be as much as 30*F, so carb ice can (and does) easily occur at 45F in high relative humidity conditions. It happened on my Kawi W650 so often despite the carb heaters that I was stopped by the side of the road on more than one occasion while I waited for the venturi ice to melt.I know what carb iceing is but havent had carb heaters on my bike in over year never have had iceing.I have seen alot of these bikes so lean they wont hardly run till they get warm though.