Carb holder leaking - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 28 (permalink) Old 12-17-2013, 09:10 PM Thread Starter
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Carb holder leaking

I have a 2002 Vulcan 750. I cleaned the carbs and replaced the float valves last year. Runs good but I can hear a vacuum leak.

I sprayed some carb cleaner around the carb boots and when I sprayed it around the rear boot, the engine picked up speed. So, it's definitely leaking.

I tried to just tighten the clamps but that did nothing.

How likely that the boots need to be replaced?

Any thoughts?
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post #2 of 28 (permalink) Old 12-17-2013, 11:31 PM
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Is it possible the carbs need re-seated in the boots? They can get a groove imprinted in the rubber, and hardened, then if you seat them too deep or too shallow, it doesn't seal as well. Also, make sure the clamps sit in their imprinted grooves, same principle.

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post #3 of 28 (permalink) Old 12-18-2013, 09:11 AM
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Some times you can loosen the Clamps and twist the intake boots a little till they line up better and then retighten the clamps and they will seal off.




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post #4 of 28 (permalink) Old 12-26-2013, 08:12 PM Thread Starter
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Thanks for the info. I'll try to adjust them. I think the clamps aren't gripping the boots tightly enough. I did make sure that they are on the correct intake and were correctly installed...but they still leak. It's a little frustrating. I'll make some adjustments and see if I can't get them to seal up.
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post #5 of 28 (permalink) Old 12-31-2013, 08:21 AM
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Make sure all the "protrusions" are aligned. When I re installed my carbs I put a thin coat of motor oil inside the boot opening which seemed to have helped getting the carbs in and seated. What I didn't do was get all the clamps in the proper position which made tightening the clamps difficult. Hopefully I'll never have to pull the carbs again but if I do I will definitely make sure clamps are on right. Just a few rookie mistakes that I made that I want to make others aware of. Hope this helps.

Last edited by rsavant; 01-01-2014 at 04:01 PM.
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post #6 of 28 (permalink) Old 12-31-2013, 09:07 AM
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Make sure all the "protrusions" area aligned. When I re installed my carbs I put a thin coat of motor oil inside the boot opening which seemed to have helped getting the carbs in and seated. What I didn't do was get all the clamps in the proper position which made tightening the clamps difficult. Hopefully I'll never have to pull the carbs again but if I do I will definitely make sure clamps are on right. Just a few rookie mistakes that I made that I want to make others aware of. Hope this helps.
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-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
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post #7 of 28 (permalink) Old 12-31-2013, 11:55 AM
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What is TOC MCCT's?
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post #8 of 28 (permalink) Old 12-31-2013, 02:09 PM
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What is TOC MCCT's?
TOC is the brand name MCCT stands for manual cam chain tensioner

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post #9 of 28 (permalink) Old 01-01-2014, 12:14 PM
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What is TOC MCCT's?
TOC Manufacturing = machine manufactured (heavy duty) MCCT's replacing Stock ACCT'[email protected] $50.00 each.
He ships from Phoenix, AZ.


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #10 of 28 (permalink) Old 01-01-2014, 03:53 PM
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How do I know if mine should be replaced?
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