Originally Posted by Kommando
So...Are you saying to try a non-USA (adjustable) stock needle, an open airbox, an adjustable idle-mix screw, a 150 Mikuni main jet, and a x40F0x muff with a smoothed header, at sea-level? Should the pilot jet remain stock or go a size bigger?
I would use the non-USA adjustable needle with or without the open airbox.
The idle mixture screw is already adjustable. If you mean an extended one, I consider those the optional, depending on how much altitude variation the bike will see.
What pilot and main jet sizes to use will have to be determined.