The order of the carb tuning process is: main jet first, then needle clip position, then pilot jet and finally idle screw settings. If you do the order back to front, every new change will mess up your previous changes!
e.g. -My bike was running lean at idle to 1/4 throttle. I changed the pilots up one size - this made it idle great but mid throttle performance was still down, so I raised the needles one notch. The mid throttle performance came good but the idle and below 1/4 throttle became RICH and I had to change the pilots back to the smaller ones - making changes in the correct order would have saved me a lot of time in getting it right.
John
In my opinion only - much too much importance is always placed on vacuum syncing in here. At full throttle or any large throttle openings the sync makes NO difference what so ever. Save your energy and perform the vacuum sync only after every needle clip change or when you're up to 1/3 throttle plug chops (where syncing will actually make a small difference)
