Another petcock question - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 10-07-2009, 01:24 PM Thread Starter
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Another petcock question

Discovered a while back that when I turned the petcock to Reserve, the carbs get no gas, even on a full tank. Figured the stealership that did a crappy job of Kreeming the tank may have coated the reserve screen. When I pulled the petcock to clean the tank, there was nothing on the petcock and the screens were intact. So, is one of those $24 ebay petcock rebuild kits gonna fix my reserve problem? Anybody ever have this problem and how did you fix it?

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
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post #2 of 7 (permalink) Old 10-07-2009, 09:52 PM
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If you're comfortable with taking the petcock apart you can easily check the flow path from the reserve screen or the main screen to the petcock valve. Just take the two screws off by the lever and pull the pieces out one at a time. The lever comes out 1st and it will have an O-ring on it, then there is a spring washer. The rubber seal will stay in most likely.

The rubber seal has a tendancy to dry rot and it will come apart in large enough pieces to block a port. Look for trash in the holes, use lacquer thinner or Wesleys Bleach white to clean it up. The rubber seal is only about $12 at Ron Ayers, use a little grease on the O-ring when you put it back together.

You shouldn't have any problems checking it out.
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post #3 of 7 (permalink) Old 10-08-2009, 12:18 AM
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If you are going to remove it to clean you may as well replace ALL wearable parts.


43028-1033 DIAPHRAGM $9.51
92055-1085 "0" RING,FUEL TAP LEV $1.83
11009-1188 GASKET,FUEL TAP $2.29
51039-003 "O" RING, FLANGE $2.29

$15.92 + shipping @ cheap cycle parts

The diaphram does include the small o-ring


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post #4 of 7 (permalink) Old 10-08-2009, 08:15 AM Thread Starter
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Thanks guys. Out it comes.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #5 of 7 (permalink) Old 10-08-2009, 03:38 PM
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I did the rebuild so anyone can do it! Make sure you "clean" out the body, I used carb cleaner............and, don't forget to take a spritz of DW40 into that little check valve where the vacuum line plugs in. If you don't, the whole rebuild is for naught :-) After you rebuild the petcock, lock lips with the vacuum check valve and suck on it. You should hear the plunger thingy or at least feel it activate. Applying the same type of vacuum to the two fuel ports, should get nothing, remembering to plug the other with you finger while applying vacuum to the other.

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post #6 of 7 (permalink) Old 10-12-2009, 12:03 PM Thread Starter
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Quote:
Originally Posted by Ablerider View Post
I did the rebuild so anyone can do it! Make sure you "clean" out the body, I used carb cleaner............and, don't forget to take a spritz of DW40 into that little check valve where the vacuum line plugs in. If you don't, the whole rebuild is for naught :-) After you rebuild the petcock, lock lips with the vacuum check valve and suck on it. You should hear the plunger thingy or at least feel it activate. Applying the same type of vacuum to the two fuel ports, should get nothing, remembering to plug the other with you finger while applying vacuum to the other.
The Vulcan Lip Lock? Anything like a mind meld?

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #7 of 7 (permalink) Old 10-12-2009, 12:09 PM
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Quote:
Originally Posted by flitecontrol View Post
The Vulcan Lip Lock? Anything like a mind meld?
Go to the vulcan star trek verses for info. lol

02 honda sabre 1100
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