Someone do this quick test please and let me know.. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 12 (permalink) Old 10-07-2013, 10:39 AM Thread Starter
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Someone do this quick test please and let me know..

I need the air valve under the seat tested..
What I want someone to do is is to remove the vacuum line from the right side of the bike from the carburetor.....
Suck on it gently and tell me if it will hold a vacuum OR you can pull air through it without creating a vacuum...

My understanding was that you should be able to pull a vacuum on this line.. Meaning that the air valve would open allowing air into the exhaust. On my bike I can't pull a vacuum so I'm thinking I've got a hole in the diaphragm..

Please let me know what you find..
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post #2 of 12 (permalink) Old 10-07-2013, 10:40 AM
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Your test is right.

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post #3 of 12 (permalink) Old 10-07-2013, 11:47 AM
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I have one I removed if you need it....cost of shipping and it's yours.
Came off an 06 and is like new.
PM me your info if you want it.
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post #4 of 12 (permalink) Old 10-07-2013, 12:13 PM Thread Starter
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Thanks for the quick replys everyone...Kc2dgq I want to take you up on your offer.. I've PMd you.
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post #5 of 12 (permalink) Old 10-07-2013, 02:59 PM
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Quote:
Originally Posted by 2kawaowner View Post
Thanks for the quick replys everyone...Kc2dgq I want to take you up on your offer.. I've PMd you.
PM replied.....you might want to consider removing all the emissions stuff, but let me know after you research MARBLING or COASTERING.
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post #6 of 12 (permalink) Old 10-07-2013, 03:09 PM
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Rip it all outa there and stop the backfiring. How annoying that was.

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post #7 of 12 (permalink) Old 10-07-2013, 04:54 PM Thread Starter
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I heard you loud and clear.... Been there done that with regard to taking it all out.. Now its time to go back to stock and approach the issues, backfiring etc., from a position using the equipment that was meant to be on the bike.. I don't mind it and it really gives me something to do..
But thanks for the responses anyway..
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post #8 of 12 (permalink) Old 10-08-2013, 01:25 AM
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Back fire is normal on stock bike. U really get better gas mileage with all the stock parts on.

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post #9 of 12 (permalink) Old 10-08-2013, 10:28 AM Thread Starter
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That's my expectation niterider so I'm gonna do it and see what happens. I'm working with another Member to get one shipped to me..
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post #10 of 12 (permalink) Old 10-14-2013, 09:43 AM Thread Starter
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UPDATE... I pulled the end off of the air valve and sure enough their was a hole in the diaghram.. which caused the rear cylinder to run lean as it was sucking unmetered air in.. I plugged the vacuum line and the bike instantly ran better. I'll be installing a good air valve later today.
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