Finally fitted the 60 idle jet and a decent linkage. It runs very smoothly but will have to check what ignition advance I've got, as there is a bit of pinking.
I too have the same carb with a mod to the top to fit the standard air filter. Where can I purchase (or which model number) a K&N filter to replace the standard one?
Checked the timing and reset to 6 deg not the 10deg I was runing. no wonder it was pinking. Now running very smoothly but the brakes are faulty (see other post).
I'm suprised that the Ashcraft set-up only has a 40 idle jet - mine was unhappy on a 50! But as long as the idle needle is in the 1.5 to 2 turn region, it must be right!
I wonder how long ago that was done?..fuel has changed a lot over the years so it might have been fine for 4star or U.S fuel but unleaded is a different bag of fish!
current V4 models..'72 95 (The Flying Banana),'72 96 (Bridget),'74 95 (Veronica),'74 96 (The Brown one)NOW SOLD..destined for greater things
hmm - i think you maybe be right - engine runs much better on the higher octane stuff. That said I think I have a (new) hole in my exhaust to attend to
Topic 
Weber 34ich
Posted - 03 Aug 2011 : 01:00:58 
