I think I will up grade the carbs possibly to a pair of mikuni 34's anyone got any experience on this subject
A few people I know have gone the other way and gone back to Bings. Roger Chaterton did and wrote a write up on the site about why he's gone back to Bings.
"Personally I'd avoid the Mikunis - various reasons, couple of which being-
much better fuel economy with the Bings - approx an extra 50+ miles per tankfull, (from 270 to a reliable 325 miles)
Mikunis were always difficult to line-up with the airbox air intake tubes, and backfired off a few times -very embarrassing,
Mikunis would allow water (rain !) in either via the throttle cable into the carbs, or via a badly fitting air intake ( see above),
choke levers were a bit of a faff-( ie no choke cables attached),
Bings seem smoother, and certainly no slower , (however, they have been "tweaked" by Richie Moore...say no more )
So - happy to have put carbs back to standard 40mm Bings.
The above is only MY experiences, so opinions might (will ) differ !! "
I called into Allens Performance a few months ago to get prices for somebody else