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Float Bowl Drain Thread Size for tubing adapters??

  • Thread starter Thread starter Darin Jordan
  • Start date Start date
D

Darin Jordan

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I would like to get an adapter for the float bowl drain holes so I can use some clear tubing to verify my float level.

Anyone happen to know what adapters might work, or of a method for doing this? I glanced through BassCliff's site and didn't really see this addressed, though I thought I had read about it being done.
 
I've read that you can just cram some tubing into the hole and it seals pretty well.
 
Darin Jordan said:
I would like to get an adapter for the float bowl drain holes so I can use some clear tubing to verify my float level.

Anyone happen to know what adapters might work, or of a method for doing this? I glanced through BassCliff's site and didn't really see this addressed, though I thought I had read about it being done.
Click to expand...

Ebay. someone sells the things already made up for $10 (not that I can find them there now.. ). It's not a common thread pitch, it's an m6x0.75. I believe. I drilled out a spare drain plug I had.
 
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Adler said:
I've read that you can just cram some tubing into the hole and it seals pretty well.
Click to expand...

That's what I do. Get some small ID, thick wall clear gas line and make the end pointy. Jam it in and give it 1/2 to 3/4 turn and it seals perfectly and doesn't even drip.

IMGP2924.jpg
 
I drilled an old drain plug and used epoxy to attach a small nipple on the end.
 
I drilled out an old drain plug and soldered a piece of copper tubing into it.


P1010834.jpg




OK it looks a bit rough but it does the job and it won't rust as it's all coated in solder.
 
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If only I had an old drain plug... Maybe I'll order one the next time I get something from Bike Bandit or ???
 
Sandy said:
That's what I do. Get some small ID, thick wall clear gas line and make the end pointy. Jam it in and give it 1/2 to 3/4 turn and it seals perfectly and doesn't even drip.
Click to expand...

You jam the tubing into the drain hole in the bottom of the carb bowl? I assume then you put a small shut off valve on the end of the tubing?
 
sal paradise said:
I assume then you put a small shut off valve on the end of the tubing?
Click to expand...

That would defeat the purpose. The tubing is temporary, held up and used as a manometer to check the height of the fuel in the fuel bowls. As long as the end stays high enough, you shouldn't lose any fuel.
 
I don't see a lot of people discussing this clear tube method for float level verification. Do you think it's worthwhile? I guess that measuring the float with carbs off should be plenty accurate, but I would like to have a "real time" reading of the fuel levels with the carbs installed.
 
Adler said:
I've read that you can just cram some tubing into the hole and it seals pretty well.
Click to expand...
That might work on some carbs, but I have seen some that had notches to the sides that allowed the gas to flow when the plug was partially-opened. The crammed tube would not seal those notches.


brad020 said:
I don't see a lot of people discussing this clear tube method for float level verification. Do you think it's worthwhile? I guess that measuring the float with carbs off should be plenty accurate, but I would like to have a "real time" reading of the fuel levels with the carbs installed.
Click to expand...
Measuring the float levels will get you into the ballpark, but the TRUE measurement is actual fuel height.

Note that the specifications call for a tolerance of only 1mm either side of 'perfect' on the float height. Depending on how heavy the float might be or how well the needle seals, you can use up that 1mm and more rather quickly.

Yes, it's very worthwhile.
icon_thumbsup.gif


.
 
Hardware stores sell plastic nipples that are close to the size. You just thread then in there & they will adapt to the threads in the carb. I used to do it all the time like that, just stick some tubing on the end and its ready to go. The guy on Ebay thats in Belgrade Mt now makes them and sells them on Ebay. I sent him one to copy originally and they work good. I use his now
 
Darin Jordan said:
I would like to get an adapter for the float bowl drain holes so I can use some clear tubing to verify my float level.

Anyone happen to know what adapters might work, or of a method for doing this? I glanced through BassCliff's site and didn't really see this addressed, though I thought I had read about it being done.
Click to expand...

They bold size is M6 X 0.75, you can order a grease fitting from McMaster, drill the back and pop the spring and ball out, put a tube on it and you have a fuel meter.

http://www.mcmaster.com/#catalog/118/2188/=hvjn0f
 
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Thats the one I have, its the same guy that makes the o-ringed fuel tubes for the CV carbs. He sells to Z1E and on Egay
 
I'm looking to make a set of these and it looks like there are a few different methods in this thread. I'm looking at the M5 water nipples on ebay. Seems like I could get them ($4 shipped), a set of -o-rings (if even required) and cheap clear poly tubing at local hardware. Amirite?

Not sure if the sizes are all the same; I have 82 GS850L I'm liking to make these to test. Add it to the tool bag.

M5 (M6 in different auction for same price)
http://www.ebay.com/itm/M5-threaded...adio_Control_Control_Line&hash=item1e5adc0316
 
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