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Why is one of my carbs keep overflowing with gas?
- dakotaford1991
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- dakotaford1991
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- spdygon
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find a small ball type brush and clean the seat.
1982 GS1000sz Katana ( #15...17K Miles)
1982 GS1000sz Katana ( # 297....7100k Miles)
1978 Kz1000 Z1R. 10K Miles1
1978 kz1000 z1r 27k miles
1977 KZ 1000 A ( Project ) 54K Miles
1976 Kz900A4 (Red)21K miles
1976 Kz900A4 ( Red)7500 miles
1974 Z1 900 project
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- Patton
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Also assure that the floats aren't installed upside down.
And also assure that the overflow tube isn't cracked or leaking at the bottom where it joins the float bowl. It's easy to check with water at the kitchen sink or with common household rubbing alcohol by simply filling the float bowl and seeing whether there's discharge from the nipple exiting from bottom of the bowl. There's not supposed to be any discharge unless the liquid reaches the entrance hole at the top of the overflow tube.
Another possibility is a maladjusted float tang.
And other possibilities would include a leaking float, or a sticking float (rubbing against side of the bowl).
Maybe the float bowl drain screw is leaking. Perhaps due to a damaged o'ring, or just too loosely tightened.
Good Fortune!
1973 Z1
KZ900 LTD
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- Patton
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Perhaps a loose float bowl screw?
Or a worn or damaged float bowl gasket?
Or a bent ear on the float bowl?
Or a loose hose connection?
Or a loose tee connection between the carbs?
Or a cracked fuel line?
Or "soggy" connection at end of fuel hose anywhere the hose connects to petcock, inline filter, or carb tee?
Might even be a cracked fuel bowl.
Good Fortune!
1973 Z1
KZ900 LTD
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- pscycle
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- MMMMHMMMM
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pscycle927
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- LineArtist
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Patton wrote: Where is exact source of the leak from carb?
Or "soggy" connection at end of fuel hose anywhere the hose connects to petcock, inline filter, or carb tee?
My problem was fixed making sure the petcock air/gas hose was well seated and turning the petcock to all positions about a dozen times, slowly to get it to settle in. I previously had cleaned the petcock - In your case if it is not a gravity feed petcock, your air hose could be clogged or the entrance to the carb is blocked. My '79 pulls air off the petcock from carb #2.
'79 KZ650B3 (stock)
'79 KZ650B3 (parts bike)
'06 HD 883R
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- LineArtist
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Waynecarpenter wrote: Where is this vent hole at? Btw when I got the bike about a month ago I dissembled the carbs and used a can of carb cleaner to go through everything I could. They should be pretty clean at this point. Still maybe I missed this hole you speak of.
There is plenty of information on carb cleaning throughout this forum. However if you simply sprayed cleaner into the various carb, most likely you moved dirt and varnish around. The only way to properly clean a carb is to take it ALL apart piece by piece and inspect each opening for blockage, replacing broken/dry o-rings and making sure jets and other essential parts are clear and working. I found using compressed air to dry the cleaned parts was critical to assure they were cleaned and ready to be re-installed. Also a full cleaning is a good way to learn how air and gas circulate through the system.
just my 2 cents
'79 KZ650B3 (stock)
'79 KZ650B3 (parts bike)
'06 HD 883R
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- Waynecarpenter
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- Waynecarpenter
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- onebadram
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81 kz 750 h2 ltd
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- Waynecarpenter
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