Fuel Tap Assembly - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 08-24-2010, 02:22 PM Thread Starter
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Fuel Tap Assembly

We have just bought a 1993 VN750-A9 and it won't start.

It seems although it's due to fuel shortage, as we can not get petrol passed the fuel tap. We taken it apart all the rubber diaphagms are fine, but cant seem to get fuel past the tap?

Any ideas? or suggestions to try.......
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post #2 of 5 (permalink) Old 08-24-2010, 03:50 PM
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The fuel will only pass through if you pull a vaccum on the system. It does not free flow when you open the petcock.

"Show me a man who makes no mistakes, and I'll show you a man who doesn't do things." Theodore Roosevelt."

2007 Victory Kingpin
Current projects - 1986 VN750 & 1988 EL250
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post #3 of 5 (permalink) Old 08-24-2010, 05:45 PM
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Yes, the middle nipple on the petcock needs vacuum applied to allow fuel to flow from the two outside nipples. Sucking on a short hose attached to the middle nipple should work, to apply vacuum to test it.

I have some salvaged syringes from a vetrinarian that I use for transfering liquids like brake fluid out of the master cylinder, or adding water to a battery while wrenching on the car or bike. I haven`t tried it yet, but if the syringe end will fit snugly on the hose to the vacuum nipple, it should apply vacuum as well.

BTW, Welcome to the Vulcan madness.


1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

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post #4 of 5 (permalink) Old 05-25-2015, 11:06 AM
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these bikes are hard work
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post #5 of 5 (permalink) Old 05-26-2015, 08:23 PM
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Originally Posted by poedale View Post
these bikes are hard work
At times and the thread you are using is from 2010 so that shows how difficult it can really be. lol

and always remember, "Ride until you rot!"
**Really not sure if the Big "C" is back right now
but having to face the fact that this is a lifetime routine
going forward. Five operations done and it still continues.

Vulcan 2000
New ride: 2009 Victory Vision Arlen Ness Signature Series
4507 miles
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