carb cleaner in vacuum line to carb - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 10-20-2017, 09:49 AM Thread Starter
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carb cleaner in vacuum line to carb

Hi Folks, I mistakenly ran carb cleaner into the vacuum line on the front carburetor, the one that goes to the center port on the petcock on my 87 vn750. I did not understand the routing of the lines from the petcock, unfortunately. Any opinions on what needs to be done, if anything? I'm hoping the fluid will just get sucked into the intake, but I am completely new to vulcan 750's. I attached a pic of the hoses involved. Your advice will be appreciated!
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post #2 of 8 (permalink) Old 10-20-2017, 10:22 AM
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It won't hurt anything, will just clean any surface it touches, like the carb throat, butterfly, etc.

Some carb cleaners will melt certain types of synthetic carb parts, but I haven't seen that on this engine. That is mostly older small engines, can melt the tip off the float valve.

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post #3 of 8 (permalink) Old 10-20-2017, 11:46 AM
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Originally Posted by Spockster View Post
It won't hurt anything, will just clean any surface it touches, like the carb throat, butterfly, etc.

Some carb cleaners will melt certain types of synthetic carb parts, but I haven't seen that on this engine. That is mostly older small engines, can melt the tip off the float valve.
+1 here, it shouldn't do any damage.
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post #4 of 8 (permalink) Old 10-20-2017, 12:08 PM Thread Starter
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Thanks, everyone. I'll let you know what happens...
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post #5 of 8 (permalink) Old 02-08-2018, 05:57 AM
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I disagree: carb cleaner absolutely can and will damage (1) the air cut valve diaphragms and (2) the slide diaphragms. I've seen and fixed enough to know. Neither are cheap to replace.

In this case, it's probably fine if it's just the one time. In the future, it's best to ride it including engine braking ASAP if this happens to clear any solvents before they can sit on the delicate rubber too long.

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post #6 of 8 (permalink) Old 02-08-2018, 06:28 AM
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should have no problems with the carb cleaner going into that hose.

if I recall, that vacuum port is on the cylinder side of the throttle plates, so very little, if any cleaner will get to the delicate parts of the carb

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post #7 of 8 (permalink) Old 02-08-2018, 11:38 AM
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should have no problems with the carb cleaner going into that hose.

if I recall, that vacuum port is on the cylinder side of the throttle plates, so very little, if any cleaner will get to the delicate parts of the carb
That's the reason it won't clean much except the throat, intake valve, and combustion chamber. The jets will never see the carb cleaner that way.

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post #8 of 8 (permalink) Old 02-08-2018, 12:35 PM
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I agree

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