I just went through this and thought I'd share with everyone......
My GS750 w/cv carbs came out of hibernation this spring with dirty carbs for some unknown reason (never did before
)
So while putting off cleaning them out and hoping they would fix themselves by running a couple-few tanks of fuel through, it developed a new problem - automatic petcock shutting off randomly. I could stop and pull the hose, apply an organically fueled vacuum sorce (me) to the petcock and fill the carb bowls, and off I'd go again. Maybe for 2 miles, maybe for 50, then same thing.
This gets old. Fast. So while at work, I begin brainstorming and realize that the same carb that provides the vacuum signal is the same one that is dirty everytime I drain the bowl (which has been frequently, see sentence one..). So I figure that hey, maybe its crudded up so much that it can't provide an adequate signal to keep the fuel flowing.
So let's hook up to another carb for the signal, right? Wait, there is only a fitting on the second carb, none of the others are machined for a vacuum port.
So I pull the carb synchronizing hex bolt from #1 on the head, find a grease zerk in the parts bin with the same threads, gut it, and install. Grab a new piece of fuel hose, run from the zerk to the petcock vacuum port, and plug the original hose with a bolt. Looks redneck but this is only a test, dig?
And guess what? My theory seems valid - no stalling/running out of fuel randomly now. Yippee!
So now I can go back to putting off pulling the carbs and doing a proper cleaning..........
Hope this helps someone, Cheers!
My GS750 w/cv carbs came out of hibernation this spring with dirty carbs for some unknown reason (never did before
) So while putting off cleaning them out and hoping they would fix themselves by running a couple-few tanks of fuel through, it developed a new problem - automatic petcock shutting off randomly. I could stop and pull the hose, apply an organically fueled vacuum sorce (me) to the petcock and fill the carb bowls, and off I'd go again. Maybe for 2 miles, maybe for 50, then same thing.
This gets old. Fast. So while at work, I begin brainstorming and realize that the same carb that provides the vacuum signal is the same one that is dirty everytime I drain the bowl (which has been frequently, see sentence one..). So I figure that hey, maybe its crudded up so much that it can't provide an adequate signal to keep the fuel flowing.
So let's hook up to another carb for the signal, right? Wait, there is only a fitting on the second carb, none of the others are machined for a vacuum port.
So I pull the carb synchronizing hex bolt from #1 on the head, find a grease zerk in the parts bin with the same threads, gut it, and install. Grab a new piece of fuel hose, run from the zerk to the petcock vacuum port, and plug the original hose with a bolt. Looks redneck but this is only a test, dig?
And guess what? My theory seems valid - no stalling/running out of fuel randomly now. Yippee!
So now I can go back to putting off pulling the carbs and doing a proper cleaning..........
Hope this helps someone, Cheers!
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