How To Verify Engine is getting fuel? Or How to Pr

  • chopper1963
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How To Verify Engine is getting fuel? Or How to Pr

15 Jan 2017 08:47
#752241
Still battling my 1983 KZ750.

I verified that all of the pilot circuits are clear and that when the fuel tank is on and the petcock is set to PRIME that the float bowls fill with fuel.

But how can one verify that the cylinders are getting fuel? Bike won't start. Confirmed spark on all four, fuel in float bowls ... growing pretty frustrated. Spins over like crazy ..

Suggestions welcome. Thanks for this forum.

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  • Nebr_Rex
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Re: How To Verify Engine is getting fuel? Or How to Pr

15 Jan 2017 09:21
#752242
Check compression and spark.


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2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected

www.dotheton.com/forum/index.php?topic=39120.0


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  • chopper1963
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Re: How To Verify Engine is getting fuel? Or How to Pr

15 Jan 2017 10:37
#752247
Compression tester to arrive early in the week.

I did the usual thing of pulling plugs and rolling the engine over ... could SEE spark so assuming it's working.

Looked at those new pilots jets. They are even smaller than those on a PW50. Came direct from Kawasaki.

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  • Patton
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Re: How To Verify Engine is getting fuel? Or How to Pr

15 Jan 2017 10:54
#752250
chopper1963 wrote: Still battling my 1983 KZ750.

I verified that all of the pilot circuits are clear and that when the fuel tank is on and the petcock is set to PRIME that the float bowls fill with fuel.

But how can one verify that the cylinders are getting fuel? Bike won't start. Confirmed spark on all four, fuel in float bowls ... growing pretty frustrated. Spins over like crazy ..

Suggestions welcome. Thanks for this forum.

If combustion occurs when using starter fluid but not otherwise, fuel might not be entering the carb bore due to an imperfect pilot circuit.

Here are some techniques to help assure fuel mix is getting from the pilot circuit into the carb bore:







Good Fortune! :)
1973 Z1
KZ900 LTD

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  • rstnick
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Re: How To Verify Engine is getting fuel? Or How to Pr

15 Jan 2017 12:05 - 15 Jan 2017 12:15
#752254
Are the spark plugs wet, do they smell of gas?
If not, clean carbs as above.

If plugs are wet and sparking, maybe timing is off.
Switch the coil wires (green & black) for the ignition. Swap the green and black wires to the coils, and try to start her.

[IMG
Rob
CANADA

Need a key for your Kawasaki? PM me

1978 KZ650 C2, 130K kms, Delkevic ex, EI, CVK32, PMC easy clutch, ATK fork brace, steering damper, braced swingarm, ZRX shocks, 18" Z1R front wheel.
2000 ZRX1100
2011 Ninja 250R - Wife's
2005 z750s (aka GPz750)
1978 KZ1000 project
Last edit: 15 Jan 2017 12:15 by rstnick.

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  • chopper1963
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Re: How To Verify Engine is getting fuel? Or How to Pr

15 Jan 2017 12:41
#752255
Thanks.

Compressed air seems to go through all of the pilot passages. Plugs are dry and clean. (replaced with new).

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Re: How To Verify Engine is getting fuel? Or How to Pr

20 Jan 2017 17:33
#752581
I'm not familiar with the carbs used on your 750, but if the plugs are dry after numerous attempts to start her up, gas is not getting sucked into the combustion chambers.
Rob
CANADA

Need a key for your Kawasaki? PM me

1978 KZ650 C2, 130K kms, Delkevic ex, EI, CVK32, PMC easy clutch, ATK fork brace, steering damper, braced swingarm, ZRX shocks, 18" Z1R front wheel.
2000 ZRX1100
2011 Ninja 250R - Wife's
2005 z750s (aka GPz750)
1978 KZ1000 project

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