Pilot Screw Adjustment

[6685]

I have a 77 cb750k.  I just put on K&N Pods, Carpy's 4 into 1 exhaust, and changed my main jets from 115 to 125.  I have the pilot screw set at 1.5 turns out.  The bike starts up fine with the choke out, but when I put the choke in it will die out.  What do the pilot screws do and would that help with the idling issue?

[Re-run]

The pilots do alot! They contribute to about 75% of the carb range. You will most likely have to turn the screws out a little to compensate. Remember, out is richer and in is leaner. Start small, turn about 1/8th a turn and get the bike warm and then open the choke. Adjust from there. Your plugs at idle should be a very light tan when choke is not on.

[6685]

Thanks for the reply.  Should I follow the Cylmer manuel on the idle mixture adjustment setting or just tune it to were I am happy with the throttle response and color of the plugs. Just messing with it I did pull the screws out to an overall of 3 turns and it does run and idle a lot better.  I had another question were is the sync adjusting nut for these carburetors it doesnt seem to go in detail in the Clymer Manuel and would a carb sync help my sticky throttle.  When I throttle the bike it seems to stay up in rpms and then slowly descend.  The cables are all new.  Thanks again.

[Re-run]

The sync nuts are under the tops of the carbs. On top of each one there is a little cover held on by 2 screws. The nuts are actually a nut for tightening on the screw that does the actual adjustment.
On the outsides of the carbs are brass screws that you remove to access the vacuum ports. You meter would hook to these 4 ports.

A sync though will not help with a stiff throttle.

For this issue, the rod that runs through all 4 carbs that actuates the slides should be greased lightly.
What cables do you have? If they are honda, from my understanding, you should NOT lube them. They supposedly have a teflon liner that gets destroyed by lubes. If they are motion pro or some other such cable, the get a tennis ball and cut it in half. Drill a small hole at the bottom of the bowl that each half makes, just large enough to fit the metal ends of the cables so it seals.
Fill the bowls with a 3-1 oil and hang up. The oil will flow slowly down and lubes the cables better than some spray would.
Routing makes a HUGE difference too. There should be no sharp bends and no pinches and nothing sitting on the cables.

You will only get so much though as the spring itself is very strong to pull against 2 cables and close 4 slides.