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Homemade Fuel Tees 19 Jul 2019 05:33 #807793

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asphalt900 wrote: Easy peezy, here are some from a set of Early KZ1000 carbs and a Z. Just follow the casting bump imprint left on the old gasket as a templet for positioning of o-ring. Bowl surface has to be CLEAN for the superglue to stick. O-ring does not compromise the height of overflow tube and choke hole doesn't really have to be fully covered. The choke has it's "air correction" built into roof of carb body. I cut at a 45deg. on the mating points of o-ring.


Thanks! That's very useful info. Can see that we'll be experimenting with O-ring-ing a rack of VM-28's this winter.

'Nuther question: We've all seen cracked brass overflow pipes. Easy fix if the crack is at the top. Not so easy if the crack extends below the inner surface of the float bowl, allowing fuel to weep between the pipe and bowl. What's been your experience with that situation? Replace the pipe alltogether?

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Homemade Fuel Tees 19 Jul 2019 05:43 #807798

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The pipe can be driven out if you chose. Yanking on it from inside the bowl will result in it snapping off flush with casting. I suppose you can solder it but kinda hard to work inside the bowl. I find it easier to first pull the exterior overflow nipple then drive it out. The nipple and tube are two different OD's. The nipple is easy to pull, just tap/collar and walk right out.

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Homemade Fuel Tees 19 Jul 2019 06:35 #807807

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Because photos are worth their weight. Tap 4-40 used for both. Pull Nipple. Tap overflow tube at least 3-4 mm deep, you'll be hammering /pushing on it later. Tapping the tube allows for it to be soldered and re-used if practical. This also allows it to be "pulled" back into it's original position without mushrooming the kneeled over end in bowl. It is a tapered tube where it goes into bowl. Same goes for the nipple if it is going to be reused. Just thread in a short 4-40 screw that has a flat flange, or washer, and tap home. The whole tapping thing is just to prevent damage and allows proper alignment in/out. A couple photos of the differences of OD of parts. Pretty universal sizes on the VM's

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Homemade Fuel Tees 20 Jul 2019 07:19 #807871

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I've replaced overflow tubes a number of times on Keinin carbs and posted photos and details of the process in threads here. It's not difficult, but there are some nuances.

Regarding the fuel tee's from ebay, I finally got my refund. The seller clearly was a broker or something to that effect because they had no clue that you can't stick a Tee with 10.2mm OD at the O-rings into a 11.0mm hole.
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Homemade Fuel Tees 20 Jul 2019 09:19 #807881

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Or a seller out of the country using a mailing address here. Busted another one. :evil:
Steve

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Homemade Fuel Tees 20 Jul 2019 10:37 #807888

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SWest wrote: Or a seller out of the country using a mailing address here. Busted another one. :evil:
Steve


You may be right Steve. The parts shipped from a local address but they didn't seem to want the parts back for lack of anything useful to do with them.

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Homemade Fuel Tees 20 Jul 2019 10:48 #807889

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Yeah been through it a number of times. When I insisted a US address they sent me a California one. Looked it up and seemed like a warehouse to me. The seller I got the cam from wanted me to send it to Spain. It was advertised as a US seller. That's why I bought it. Cost him his eBay account and now he's in hot water with Pay Pal. :lol:
Steve

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Homemade Fuel Tees 21 Jul 2019 04:43 #807911

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Since everyone likes photos...here are the completed carbs.

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Homemade Fuel Tees 21 Jul 2019 05:13 #807912

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asphalt900 wrote: Because photos are worth their weight... ... ...Pretty universal sizes on the VM's


Thanks ! That's very useful.

Good Ridin'
slmjim & Z1BEBE
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A Rider looks at your odometer and tags.

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Homemade Fuel Tees 21 Jul 2019 07:07 #807920

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No problem slmjim! From your posts it appears you also do restores, fun isn't it? I keep them all original so all the references I respond to are geared in that direction. Any luck on the Bowls?? Clay

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Homemade Fuel Tees 22 Jul 2019 05:57 #807968

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asphalt900 wrote: ... Any luck on the Bowls?? ...


We won't be experimenting with O-ringing VM28 bowls until this winter. Need to get the bulk material anyway.

It's Ridin' season, there's a '73 Z1 (The Wounded Z) motor, frame & frame parts to finish painting while it's warm enough to do so outside (when wind & humidity cooperate, that is), Carb rebuilds/major component reassembly are generally saved for cold, rainy fall weeks or mid-winter when snow is on the ground.

Good Ridin'
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A Rider looks at your odometer and tags.

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1974 Z1-A x2
1975 Z1-B x2
1993 CB 750 Nighthawk x2
2009 ST1300A

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Homemade Fuel Tees 22 Jul 2019 07:05 #807974

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Using an O-ring in that application goes against basic O-ring design standards, not to mention basic design in general. Sorry to bash but it's a very bad idea.

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