cruise throtle problem - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 10-05-2011, 12:25 PM Thread Starter
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cruise throtle problem

I did an ear shave and 40/140 jets k/n filters with stock eghaust. ive tried turning the air fuel up and down.it runs fine wfo and at idle but at a steady cruise it hesitates up and down it only wants to really run well screaming wide open. do you think im going to have to open up the eghaust to cure this or what
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post #2 of 7 (permalink) Old 10-05-2011, 12:28 PM
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Make sure that the carb vent hose is not in the wind. This is the hose that "t"s out. It should be connected to the right ear or up under the fuel tank. If you get dirrect air flow it will cause for uneven running.

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post #3 of 7 (permalink) Old 10-05-2011, 12:38 PM
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Did you use shims on the needles?
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post #4 of 7 (permalink) Old 10-05-2011, 12:48 PM Thread Starter
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They are factory pro 3 rd clip position like they said to do
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post #5 of 7 (permalink) Old 10-05-2011, 02:44 PM
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X2 on the vents. Could be partially blocked/kinked as well. Exhaust doesn't matter. Mine is jetted the same size with stock exhaust, no problems mid throttle. Did you plug the vacuum fitting on the right carb? I have to ask.. people do forget.

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post #6 of 7 (permalink) Old 10-05-2011, 02:49 PM
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Check go see if the diaphragms are working right and that they don't have any holes in them....

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post #7 of 7 (permalink) Old 10-06-2011, 10:44 AM Thread Starter
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carb problem fixed

yes it had the right side vacume caped,,,,new vac diaphrams,,,i did just move the vent hose from where i had it run back by the battery and i took out the goats belly and put on the stub mufflers and now it runs just fine. it didnt have a direct flow of air running at it there but it could have been a back draft i guess. im going to do some work with my eghaust now to get it like i want it,,,,,,,,,thanks guys for the help
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