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Post by allan on Aug 22, 2015 8:34:30 GMT -5
Hi all,
I have three questions. 1) Can any one be very specific as to where the check valve is and what it looks like? 2) There are two tubes on top of the carb, one from the top of the vacuum and the other from the triangle. Can you tell me which tube goes on which hole on top of the carb? 3) The rubber protector on the stem from the vacuum on the bottom of the carb is torn. Does this matter and if so where can I find one?
Thanks
Allan
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Post by wayne on Aug 22, 2015 18:39:22 GMT -5
Allan, 1: The check valve is a small banjo union (miniature version of the ones on the ends of your brake lines at the calipers) at the very front, upper left side of the carby from the riders view. It is held in by a flanged 8 mm hexagonal bolt. It's so close to the radiator fins that it is advisable to slip a piece of plastic or cardboard sheet down between the carb and radiator fins to protect the latter if you are trying to undo it. 2: The tube from the vacuum bell housing goes to the higher of the two fittings, the tube from the "triangle" (this is a fuel enrichment valve) goes to the lower fitting. 3: Won't make much difference. It's just a dust shield to keep that area of the carby behind the cover clean (that "box" the choke lever is attached to). In the second picture you can clearly see the hose and check valve/banjo fitting and its 8mm bolt to the left centre of the picture. As an aside, note the differences in the fuel inlets for these two RE5 carbs. The first one is a later version (still appeared on the M series though) and the second is an earlier version.
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Post by allan on Aug 23, 2015 8:26:59 GMT -5
Thanks Wayne,
So the banjo union itself is the check valve? How do I verify if it working or not?
Allan
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Post by timpa136 on Aug 23, 2015 11:21:35 GMT -5
Allan,
The metering pump check valve at the carb. will allow the metering pump oil into the float bowl for mixing but should check or not allow say a flooding carburetor to back wash into the pump which could allow the pump to be damaged from lack of lubrication. To test, get a hand held vacuum pump and test it in both directions. I've been successful with cleaning a stuck valve with wd/40 or carburetor/choke cleaner. We always caution to add oil to the fuel until certain it's functioning. The new hose is still available from Suzuki as a GT750 item and watch that it doesn't get pinched in the metering pump cover!.
Timpa136
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Post by wayne on Aug 23, 2015 18:54:04 GMT -5
Allan, this may help you get your head around the check valve...........this is a sectioned original valve:
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Post by allan on Aug 24, 2015 7:29:38 GMT -5
Thank you Wayne and Tim,
This is the first time I can actually see what it looks like. This is a huge help.
Thanks
Allan
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Post by timpa136 on Aug 24, 2015 11:03:33 GMT -5
And thank you also to Wayne for the illustration.
Tim
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Post by mick695 on Aug 24, 2015 12:53:01 GMT -5
Great thread guys.........I wonder if there are any other pictures of sectioned parts out there that could be used to educate us.
Cheers
Mick
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Post by jm0406 on Aug 24, 2015 14:57:05 GMT -5
Wayne, Did you section that check valve? You have too much time on your hands. Jeff
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Post by wayne on Aug 24, 2015 20:36:12 GMT -5
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Post by jm0406 on Aug 25, 2015 11:00:12 GMT -5
I remember seeing that some time ago. It is nice to see how things are actually put together. Jeff
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Post by mick695 on Aug 25, 2015 15:24:53 GMT -5
Cheers Wayne
Sections always do it for me mate..........nothing like seeing the real thing cut open to see how it works.
Mick
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