A/F screw adjustment question

[midmoraider]

Hey all, I am trying to get the bike dialed in as good as possible. When setting the a/f screws does anyone ever hook up the carb sync to watch each cylinder? Reason I ask is that I don't notice a whole lot of difference once I start untightening the set screw on the a/f. I can tell when it's closed as it starts to stumble and miss, but seeing exactly where it's "recovered" is a lot more open to interpretation. I thought it might be easier to see when it's good by watching the carbtune. Does this make sense or am I way off here? Thanks.

 

[KosRider]

midmoraider, using the carbtune when adjusting the A/F screws won't help; the two are completly different. The carbtune is used to sync the butterfly valves in the carbs via the mechanical linkages so they all open the same. The A/F screw adjusts the air / fuel mix for idle / low speed engine RPMs.

 

[PATMAX]

What you are looking for is an exhaust gas analyzer. Check out Damon Ferriaolo carb video for specifics. Your shop with EGA can dial you in.

 

[jfeagins]

When dialing in your A/F screws, it helps to have the synch hooked up simultaneously, and be sure your synch is spot on, but the synch won't alter your A/F settings all that much. Being in synch WILL help you be able to LOWER your idle down below factory specs - which does help you get just the right 'sweet spot' in your individual A/F settings. Just remember to readjust your idle back up to spec when you're finished getting the A/Fs set right.

...just my two cents....