Carb syncing question Options

[Cevan]

I'm trying to sync the carbs (Weber IDFs) on my new engine. I warmed it up and then let it idle at about 800 rpms. I disconnected the linkage and used the synchometer. On one carb, both barrels were very close to each other (5 and almost 5), while the other carb read a 5 and a 3. Is this indicative of a bent shaft or some other problem, or can this be adjusted?

I do recall removing the throttle plates from one of the carbs while I was cleaning them. I was going to remove the shaft but decided against it and put the plates back on. Might I have changed the position of one or both of the throttle plates in relation to the bore? Would this cause the problem?

Also, fuel seems to be almost weeping in the area of the brass bolt and washer (#5 and 6 in the picture) directly under where the feed line connects to the carb. I used a new washer and tightened the bolt real good. Any ideas?

[VaccaRabite]

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#48 is air bypass. Loosens the lock nut and slowly open the screw. This changes the ratio of fuel to air, opening will take you leaner as you are letting in more air past the butterfly.

#41 is the mix screw (it has the spring). It does not effect the ratio of fuel or air, just the volume of it. As you know, this only needs to be open enough to keep the cylinder running happy.

Before fiddling with these, though. look for leaks. Run a propane torch so that only propane is being put out (no fire.) while the motor is running. If the RPM picks up while you have the torch near a joint, you have found a leak.

Zach
Zach