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KZ750 Float Bowl Tube Cracked?

  
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Matt Stecher

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Since: Sep 27, 2004
Posts: 9



(Msg. 1) Posted: Mon Sep 27, 2004 3:10 am
Post subject: KZ750 Float Bowl Tube Cracked?
Archived from groups: rec>motorcycles>tech (more info?)
I am troubleshooting an fuel overflow problem with my 1981 KZ750.

After checking the overflow hoses from each carb it turns out that the one
on the left is overflowing freely. I pulled the carbs and pulled the float
bowl only to find out that the tube that projects into the float chamber is
cracked from bottom to top.

What are my options for fixing this?

I have a few thoughts, but am not very familiar with carbs.
1. Use heat shrink tubing to cover the tube? (I am not sure if it is fuel
resistant)
2. Try to solder up the tube?
3. Replace the bowl outright? (where can I get just one bowl)

Thanks
Matt

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niNjaTaz

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Since: Nov 27, 2003
Posts: 41



(Msg. 2) Posted: Mon Sep 27, 2004 3:10 am
Post subject: Re: KZ750 Float Bowl Tube Cracked? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
On Mon, 27 Sep 2004 02:10:17 GMT, "Matt Stecher"
<mrcc1234.TakeThisOut@sbcglobal.net> wrote:

 >I am troubleshooting an fuel overflow problem with my 1981 KZ750.
 >
 >After checking the overflow hoses from each carb it turns out that the one
 >on the left is overflowing freely. I pulled the carbs and pulled the float
 >bowl only to find out that the tube that projects into the float chamber is
 >cracked from bottom to top.
 >
 >What are my options for fixing this?
 >
 >I have a few thoughts, but am not very familiar with carbs.
 >1. Use heat shrink tubing to cover the tube? (I am not sure if it is fuel
 >resistant)
 >2. Try to solder up the tube?
 >3. Replace the bowl outright? (where can I get just one bowl)

Heat shrink tubing won't do it. I have had good experience soldering
the crack. Just make sure that you wash the bowl out REAL good.
Remember that gas IS flamable! Also, you will have to clean the brass
tube good. I use a Dremel with a flex-shaft and fine-grit miniature
grinding stone attachment to clean the area that needs to be soldered.
Before you solder, it will help if you smear some rosin flux on the
tube. This will help the solder to stick. After you solder the tube,
you can make sure you got it all by filling the bowl with water and
blowing air through the tube from the bottom of the bowl with your
finger over the top to stop the air from escaping. If you see any
bubbles in the water, then you missed a spot some where. If you don't
see any bubbles, you can put it back together. Good luck...

---
Derek Tombrello
Shelby Cycle

<a style='text-decoration: underline;' href="http://www.ShelbyCycle.com" target="_blank">http://www.ShelbyCycle.com</a>

reply-to address is invalid<!-- ~MESSAGE_AFTER~ -->

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Andrew Szafran21

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Since: Sep 25, 2004
Posts: 21



(Msg. 3) Posted: Mon Sep 27, 2004 5:31 pm
Post subject: Re: KZ750 Float Bowl Tube Cracked? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
niNjaTaz <DarkKnight.DeleteThis@large.cum> wrote:
 > On Mon, 27 Sep 2004 02:10:17 GMT, "Matt Stecher"
 > <mrcc1234.DeleteThis@sbcglobal.net> wrote:

  >>I am troubleshooting an fuel overflow problem with my 1981 KZ750.
  >>
  >>What are my options for fixing this?
  >>
  >>I have a few thoughts, but am not very familiar with carbs.
  >>1. Use heat shrink tubing to cover the tube? (I am not sure if it is fuel
  >>resistant)
Heat shrink tubing will likely dissolve in fuel.

  >>2. Try to solder up the tube?

That should work, although I'm not sure how well solder will stick to the
cheap aluminum of the float bowls. JB-Weld or some other fuel resistant
epoxy compound might also work. Another solution might be to find a
length of metal (copper) tubing with an inside diameter the same or
slightly larger than the outside of the float bowl tube. Mix up some
JB-Weld and coat the outside of the float bowl tube, and push the length
of metal tubing over the tube.

  >>3. Replace the bowl outright? (where can I get just one bowl)
EBay or a bike junkyard, if you have any in your area.

-Andrew<!-- ~MESSAGE_AFTER~ -->
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Scott Smith1

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Since: Sep 10, 2004
Posts: 3



(Msg. 4) Posted: Thu Sep 30, 2004 10:50 pm
Post subject: Re: KZ750 Float Bowl Tube Cracked? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Matt Stecher wrote:
 > I am troubleshooting an fuel overflow problem with my 1981 KZ750.
 >
 > After checking the overflow hoses from each carb it turns out that the one
 > on the left is overflowing freely. I pulled the carbs and pulled the float
 > bowl only to find out that the tube that projects into the float chamber is
 > cracked from bottom to top.
 >
 > What are my options for fixing this?
 >
 > I have a few thoughts, but am not very familiar with carbs.
 > 1. Use heat shrink tubing to cover the tube? (I am not sure if it is fuel
 > resistant)
 > 2. Try to solder up the tube?
 > 3. Replace the bowl outright? (where can I get just one bowl)
 >
 > Thanks
 > Matt
 >
 >
I'd go the solder route. If that doesn't work, let me know. I have some
old bowls off my 81 KZ750. Which one do you need?<!-- ~MESSAGE_AFTER~ -->
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Matt Stecher

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Since: Sep 27, 2004
Posts: 9



(Msg. 5) Posted: Tue Oct 05, 2004 2:00 pm
Post subject: Re: KZ750 Float Bowl Tube Cracked? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
 > I'd go the solder route. If that doesn't work, let me know. I have some
 > old bowls off my 81 KZ750. Which one do you need?

The solder seemed to do the trick. Once I got it real clean I was able to
tin it and then built it up to cover the crack.

I have a float that is questionable, do you still have these for this bike?

Thanks, Matt<!-- ~MESSAGE_AFTER~ -->
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Scott Smith1

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Since: Sep 10, 2004
Posts: 3



(Msg. 6) Posted: Thu Oct 07, 2004 11:34 am
Post subject: Re: KZ750 Float Bowl Tube Cracked? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Matt Stecher wrote:
  >>I'd go the solder route. If that doesn't work, let me know. I have some
  >>old bowls off my 81 KZ750. Which one do you need?
 >
 >
 > The solder seemed to do the trick. Once I got it real clean I was able to
 > tin it and then built it up to cover the crack.
 >
 > I have a float that is questionable, do you still have these for this bike?
 >
 > Thanks, Matt
 >
 >
Yes, I have a floats as well.<!-- ~MESSAGE_AFTER~ -->
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Matt Stecher

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Since: Sep 27, 2004
Posts: 9



(Msg. 7) Posted: Sat Oct 09, 2004 12:04 am
Post subject: Re: KZ750 Float Bowl Tube Cracked? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Scott,

How much would you like for a float bowl and float?

Thanks,
Matt

"Scott Smith" <smsmith1234 RemoveThis @hotmail.com> wrote in message
news:3Z89d.10659$gs1.8723@newsread2.news.atl.earthlink.net...
 > Matt Stecher wrote:
   >>>I'd go the solder route. If that doesn't work, let me know. I have some
   >>>old bowls off my 81 KZ750. Which one do you need?
  >>
  >>
  >> The solder seemed to do the trick. Once I got it real clean I was able
  >> to tin it and then built it up to cover the crack.
  >>
  >> I have a float that is questionable, do you still have these for this
  >> bike?
  >>
  >> Thanks, Matt
 > Yes, I have a floats as well.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: KZ750 Float Bowl Tube Cracked? 
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