Hi, I have discovered a problem with my #1 carb. It is opening when I open the throttle but when I try to adjust it, it doesn't do anything. I could turn the adjustment screw either way and it doesn't respond. I know I will probably have to remove the carbs to figure this out. Has anyone else encountered this problem?
Carburetor adjustment
- Thread starter ludwig
- Start date
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slabghost
Well-known member
Are you talking the adjustment screw under the carb next to the float bowl?
No not the pilot screw, the screw used for syncing adjustment.
slabghost
Well-known member
So no change of vacuum? Or rpm?
hmmmmmm could be air leaking somewhere
Well, I guess I'll have to take em out. The hard part for me is getting them out, the harder part is diagnosing the problem, the hardest part is getting them back in, (connecting the throttle cables) . The bike is still running strong enough for now so I'll probably do it in the winter. Thanks all. :thanks:
slabghost
Well-known member
If it's running strong. I'd run it and add ATF to the fuel regularly.
Atf to fuel? What will that do.
slabghost
Well-known member
Clean the carbs and stabilize the fuel.
One you get them out you can get it close to sync with a feeler guage, but yea..getting them out and in is a PITA.
Jeff, would you happen to know the size of the feeler gauge? I thought about using a feeler gauge but just wasn't sure of what size.
slabghost
Well-known member
I'd use the idle screw to set the unadjustable carb to rub a paper clip wire. Then adjust the other carbs at the linkage to fit the wire the same way.
as Slab said, the main thing is getting them all equal, the size object isn't so important because you can adjust the idle down or up , adjust the #3 carb using the idle screw till the paper clip(or whatever) has slight resistance then adjust the others to match using the sync screws, cycle the throttle by hand and recheck...after a good manual sync many find running sync is so close little or no further adjustment is necessary.
Thanks, I know how to adjust the carbs but the problem is that the adjustment screw on #1 is not working. It will turn in/out but has no effect. I believe it's either the screw is striped or the flap is stuck. I won't know for sure until I pull the S.o. b.'s out. Right now it starts and runs but it sounds like a diesel.
you could pull the manifold off and take a look to see if it is actually moving the butterfly, carbs don't have to come out to check the adjustment that way., pull the adjacent one too and compare.[url=https://classicgoldwings.com/forum/viewtopic.php?p=180779#p180779:smif7c7m said:
Hmm, I just might have to try that. While I'm at it, I noticed inside of the intake chamber of each carburetor there are four tiny dots in a diamond pattern. When the flap is closed all the way the edge covers the outermost dot, when opened slightly the edge lines up with the two dots that are side by side, when opened to the third single dot it looks like the flap would be open too much. I was wondering if these dots are reference points for bench syncing. I know they are not there for decoration. Back to the manifolds, are they very hard to pull off while they are still on the bike? Cause the last time I had the carbs. Out I remember I struggled a bit getting them off.
Dots are where the fuel/air mixture enters the manifolds, they can be tough getting off the first time but usually are easier the next time, I spray mine with some WD40 before I slip them on, maybe makes the second time easier...I also put a blanket or something around things or wear gloves..sometimes you can bust your hand on something if they break free suddenly, seems pulling upwards would keep from damaging anything, I wouldn't use anything to pry but my hands.
