Simple solution?

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10 Mar 2009 19:13 #271052 by Wallybanger
Simple solution? was created by Wallybanger
So I just went to the trouble of stuffing my carbs back into my bike and fighting with the airbox.

I fired it up and it seems to be running strong on 3 cylinders but my outboard carb on the left is pissing gas like it's allergic to the stuff. It's all coming out of the hose on the bottom of the float bowl... I'm wondering if this would be why the thing won't run on that cylinder.

Any quick remedies? I'm assuming I need to pull my carbs out again :angry:

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10 Mar 2009 19:17 #271055 by timebomb33
Replied by timebomb33 on topic Simple solution?
sounds to me like you have abad needle and seat assembly or as the manufactors call them float vavles.

1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE

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10 Mar 2009 19:18 - 10 Mar 2009 19:45 #271057 by Patton
Replied by Patton on topic Simple solution?
Wallybanger wrote:

So I just went to the trouble of stuffing my carbs back into my bike and fighting with the airbox.

I fired it up and it seems to be running strong on 3 cylinders but my outboard carb on the left is pissing gas like it's allergic to the stuff. It's all coming out of the hose on the bottom of the float bowl... I'm wondering if this would be why the thing won't run on that cylinder.

Any quick remedies? I'm assuming I need to pull my carbs out again :angry:


While engine's idling and carb leaking, try rapping smartly against the carb float bowl with a plastic mallet or screwdriver handle. Often frees things up after carb reassembly to allow proper seal at float needle/seat interface.

Good Luck! :)

1973 Z1
KZ900 LTD
Last edit: 10 Mar 2009 19:45 by Patton.

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10 Mar 2009 19:23 #271061 by 650ed
Replied by 650ed on topic Simple solution?
You may not need to pull carbs. Drain the bad one and remove the bowl. You then can deal with the float valve to see if it's sticking and clean if needed. The little stubby needle should move very freely up and down in the orifice. It will drop out when you remove the float giving you access to the orifice. Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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10 Mar 2009 23:55 #271112 by Wallybanger
Replied by Wallybanger on topic Simple solution?
ya, i figured it was the float and needle valve. Do you think that would cause the cylinder to run like crap? the carb looked good when I pulled it apart. No rips in the diaphragm, clean bowl and the jets looked fine.

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11 Mar 2009 02:45 #271116 by timebomb33
Replied by timebomb33 on topic Simple solution?
yes that would make it run badly pull out the float valve needle and look for wear marks or grooving towards the end of if you have any that will be the problem.

1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE

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11 Mar 2009 04:18 - 11 Mar 2009 04:18 #271122 by Wallybanger
Replied by Wallybanger on topic Simple solution?
Awesome, thanks guys, I'll check it out today.
Last edit: 11 Mar 2009 04:18 by Wallybanger.

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13 Mar 2009 00:17 #271534 by Wallybanger
Replied by Wallybanger on topic Simple solution?
Awesome! Apparently things sorted them selves out. Must have just been a sticky float bowl. Took it for a ride today, lots of power, runs smooth :D

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