Hi Jeff...I wouldn't necessarily recommend a bigger main jet. Joe Rosson from Texas inferred he didn't have any real problems with the fuel.
I would search the site for one of Joes postings and get in touch with him directly for some first hand knowledge of using the stuff....Ian ...PS jrosson86@att.net
Hi Jeff
I live in England a where as well as WM20 I run a Norton Commando on standard twin Amals. I recently shipped my bike to the USA where I did 2.000 miles on it with no fuel problems. My friend was on a 1945 Norton ES2 with standard Amal 276 carb, and he had no ptoblems either.