Why is one of my carbs keep overflowing with gas?

  • Waynecarpenter
  • Waynecarpenter's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 66
  • Thanks: 0

Why is one of my carbs keep overflowing with gas?

16 May 2014 10:05
#632649
I have a set of k&n pod filters on my carbs. On one of my carbs it seems to be overflowing and dripping out of the filter. Any ideas?

Please Log in or Create an account to join the conversation.

  • mopguy
  • mopguy's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • Posts: 727
  • Thanks: 167

Re: Why is one of my carbs keep overflowing with gas?

16 May 2014 10:28
#632651
Could be the float or needle is stuck, try tapping the float bowls and see if vibration loosens it up, if it still overflows, then you need to re adjust the float using the clear tube test method.
I have a 1980 Kawasaki KZ750 Ltd. I bought new. I recently managed to get it out of my garage after 28 years and put it on the road again (2010). I feel like a kid all over again. Since I have acquired 3 78 KZ1000 Ltd, 1 1981 KZ1000 Ltd, and another 1980 KZ750 Ltd. Love the LTD's.

Please Log in or Create an account to join the conversation.

  • Waynecarpenter
  • Waynecarpenter's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 66
  • Thanks: 0

Re: Why is one of my carbs keep overflowing with gas?

16 May 2014 10:36
#632653
I remember seeing a post about that. I'll search but in the mean time does anyone have a link to it?

Please Log in or Create an account to join the conversation.

  • Waynecarpenter
  • Waynecarpenter's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 66
  • Thanks: 0

Re: Why is one of my carbs keep overflowing with gas?

16 May 2014 12:28
#632659
Also pulled the tank. I have a Manuel petcock. On flows gas very well. Reserve flows very well. When it's on the off position it still slightly flows. Could this be the issue? If so why does only one carb overflow?

Please Log in or Create an account to join the conversation.

  • slayer61
  • slayer61's Avatar
  • Offline
  • User
  • User
    Registered
  • KZR FLAG RELAY CARRIER #62
  • Posts: 911
  • Thanks: 277

Re: Why is one of my carbs keep overflowing with gas?

16 May 2014 13:10
#632664
Waynecarpenter wrote: Also pulled the tank. I have a Manuel petcock. On flows gas very well. Reserve flows very well. When it's on the off position it still slightly flows. Could this be the issue? If so why does only one carb overflow?
like mopguy already said... "Could be the float or needle is stuck, try tapping the float bowls and see if vibration loosens it up, if it still overflows, then you need to re adjust the float using the clear tube test method. " Also look at replacing the faulty float valve needle and seat. Consider this... If one is leaking now, will the others be long behind?
A petcock that leaks isn't good. in the "OFF" position it should be "OFF".
Don't be ridiculous! It's only a flesh wound!

[strike]Wife's little bike... 1984 GPZ 550 Kerker and DynaJet stage I kit[/strike]
Wife's BIG bike......[strike] 1981 GPZ 1100 Kerker and [strike]factory FI[/strike] Mikuni RS34s W/ K&N pods[/strike] SOLD

Please Log in or Create an account to join the conversation.

  • 331lxstang
  • 331lxstang's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 14
  • Thanks: 2

Re: Why is one of my carbs keep overflowing with gas?

16 May 2014 15:47
#632679
Check float level, check for leaking needle and seat, and from personal experience that almost drove me bonkers check that overflow tube in the bowl itself for a crack or hairline split. Mine had a hairline crack in it and no matter where you set the float fuel kept running out the overflow. I think its a rarity, but I'll never rebuild a set of carbs again without checking the overflow tubes.
1977 Santee hardtail, 1075 Andrews 3x cams, old school
1978 KZ 1000 under restoration to original

Please Log in or Create an account to join the conversation.

  • Waynecarpenter
  • Waynecarpenter's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 66
  • Thanks: 0

Re: Why is one of my carbs keep overflowing with gas?

18 May 2014 10:31
#632841
I'll look into the petcock a little later. The float seems to be very free, unstuck and bouncy. See pic to confirm I'm looking at the correct part.

Attachment ImageUploadedByTapatalk1400434021.970866.jpg not found



Next as far a the needle being stuck. Just to confirm the needle you are talking about it the needle in the plunger thing on the top portion of the carb right.

Attachment ImageUploadedByTapatalk1400434221.255358.jpg not found



If so the plunger and needle move very easily and seem to be unstuck.

Attachments:

Please Log in or Create an account to join the conversation.

  • Waynecarpenter
  • Waynecarpenter's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 66
  • Thanks: 0

Re: Why is one of my carbs keep overflowing with gas?

18 May 2014 10:39
#632842
Btw gas seems to be coming from here.

Attachment ImageUploadedByTapatalk1400434426.490792.jpg not found



This plug and o ring seems to have seen better days. It doesn't seem to actually seal itself in the hole. Could almost just fall out its that loose.

Attachment ImageUploadedByTapatalk1400434606.435727.jpg not found



My thought is since it doesn't seal gas is going through it and leaking out.

Attachments:

Please Log in or Create an account to join the conversation.

  • Waynecarpenter
  • Waynecarpenter's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 66
  • Thanks: 0

Re: Why is one of my carbs keep overflowing with gas?

18 May 2014 10:47
#632844
Does my float valve needle look ok? How do I know if it's bad. Also anything look bad with the seat based on just a pic?

Attachment ImageUploadedByTapatalk1400435051.290967.jpg not found



Attachment ImageUploadedByTapatalk1400435130.095792.jpg not found



The plunger in the float needle seems free. And the float needle goes in and out of the seat without problem.

Attachments:

Please Log in or Create an account to join the conversation.

  • Waynecarpenter
  • Waynecarpenter's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 66
  • Thanks: 0

Re: Why is one of my carbs keep overflowing with gas?

19 May 2014 08:21
#632925
Anyone?

Please Log in or Create an account to join the conversation.

  • nickleo373
  • nickleo373's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 587
  • Thanks: 33

Re: Why is one of my carbs keep overflowing with gas?

19 May 2014 09:57
#632940
Push the spring on the float pin. If you see dirt come flying out of it or it doesn't return to it's original position quickly, you should replace the seats and needles.
1981 KZ550C LTD
"If you ain't first, you're last"

Please Log in or Create an account to join the conversation.

  • Waynecarpenter
  • Waynecarpenter's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 66
  • Thanks: 0

Re: Why is one of my carbs keep overflowing with gas?

19 May 2014 17:59
#633022
It returns just fine. And no dirt comes out. Gonna check the fuel level. Gotta get some clear hose.

Please Log in or Create an account to join the conversation.

Moderators: Street Fighter LTD
Powered by Kunena Forum