Fuel Air Mixture

zimmey356
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Fuel Air Mixture

23 Apr 2009 17:56

I think this goes in this forum, my 83 KZ 550A recently died on me and I had to push it about a quatermile in GA heat...whew...Anywho..I thought it was the spark plugs, so I chagned them, now when I start her up she will idle not very long and I hear a noise in one of the right side carbs, but as soon as you give it gas it just dies out, so i'm thinking a fuel air mixture, but have no idea where to start!!!!

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timebomb33
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Re: Fuel Air Mixture

23 Apr 2009 18:08

#284546

you have to ask your self how could the fuel air mixture change by itself not gonna happen it sounds like to me it's either a plugged fuel supply or something electrical don't change the settings on your carbs unless the carb fairy's got to it sometime when you wern't looking

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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zimmey356
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Re: Fuel Air Mixture

23 Apr 2009 18:11

#284549

Well It was running great up until it died on me so i don't know what caused it like how would it be an electircal problem? Sorry Just trying to go over in my mind everything involved with the fuel air mixture...

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Patton
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Re: Fuel Air Mixture

23 Apr 2009 18:13

#284552

Would assure valve clearances are to specs.

Good Luck!

1973 Z1
KZ900 LTD

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Kawickrice
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Re: Fuel Air Mixture

23 Apr 2009 18:19 - 23 Apr 2009 18:20

#284555

Sounds like no fuel to mix. Have you pulled the fuel line from the petcock to see if fuel is getting to the carbs. Maybe a clogged fuel filter?

73 Kawasaki Z1
07 HD CVO Ultra Classic
82 Suzuki GS 1100
74 Yamaha RD 350 (My two stroke toy)
77 Kawasaki KZ 650B-1 (My putt around bike)
80 Indian Moped (My American Iron)
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75 Suzuki GT550
74 GT 380
79 RD 400 Daytona Special
72 Honda CL 175
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Last edit: 23 Apr 2009 18:20 by Kawickrice.

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timebomb33
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Re: Fuel Air Mixture

23 Apr 2009 18:23

#284561

pull off your fuel line and check the fuel flow coming out of the petcock.

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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Patton
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Re: Fuel Air Mixture

23 Apr 2009 18:25

#284563

Kawickrice wrote:

Sounds like no fuel to mix. Have you pulled the fuel line from the petcock to see if fuel is getting to the carbs. Maybe a clogged fuel filter?

And is there plenty of gas in the tank? And not needing to go on "reserve" (if the petcock is fully functional). Or maybe the petcock is clogged. Or the petcock screen up inside the tank is clogged.

Good Luck!

1973 Z1
KZ900 LTD

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zimmey356
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Re: Fuel Air Mixture

23 Apr 2009 18:25

#284564

Well when I put it on primary it starts but won't stay so the fuel is coming....or should i check it a different way

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Patton
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Re: Fuel Air Mixture

23 Apr 2009 18:48

#284580

zimmey356 wrote:

Well when I put it on primary it starts but won't stay so the fuel is coming....or should i check it a different way

Could loosen or remove carb float bowl drain screw and see whether fuel flows freely out the drain. This will at least show whether or not fuel is getting into the floatbowl.

Good Luck!

1973 Z1
KZ900 LTD

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zimmey356
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Re: Fuel Air Mixture

23 Apr 2009 18:53

#284584

I've rebuilt the carbs, changed the float bowls, and more of the jets, oil change,fuel geting to all carbs, new spark plugs and spark plug wire caps...There was one jet in each carb that we cuoldn't change because our rebuild kit didn't come with it....

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timebomb33
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Re: Fuel Air Mixture

23 Apr 2009 20:00

#284613

yes but do you have any fuel coming out of the petcock check that first. take the line off and turn on the valve.

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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bill_wilcox100
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Re: Fuel Air Mixture

23 Apr 2009 20:05

#284617

Try leaving the gas cap open. If it solves the symptom, it is a fuel tank venting issue (it's not venting enough). Consider changing the fuel tank cap rubber gasket. Fairly inexpensive part from Z1 Ent.

Best of success.

1977 KZ650-B1 (Stock)
Upgrades:
- Dyna S Electronic Ignition (DS2-2)
- Dyna 3 Ohm Coils (DC1-1)
- Coil Repowering Mod
- Progressive Springs Front & Rear
- Saddlemen Seat Cover
- New Metallic Red Re-Paint & Repro Badges.
Montreal, Canada

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