kz1000e-1 overheating

  • Hambo
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kz1000e-1 overheating

03 Sep 2011 13:43
#474031
Hello again everyone,
Well Ive got my bike running but now I have an overheating problem. After not more than 5-7 miles it is very hot and starts to sputter unless I give more throttle. I have replaced the carb. boots and checked the timing with a timing light and the "F" mark is dead nuts on the case mark. I put new o-rings on the pilot screw, the old ones were cracked and hard. Any help or suggestions would be greatly appreciated.

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  • etbike3135
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Re: kz1000e-1 overheating

03 Sep 2011 15:31
#474042
I guess you need to explain what condition your bike is in?

Does it have the stock exhaust

Does it have the airbox

Has it been rejetted

Did you ever try opening the gas cap to see if that helped? Vapor lock
1973 Kawasaki Z1
18 years in dragbikes

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  • TexasKZ
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Re: kz1000e-1 overheating

03 Sep 2011 15:54
#474044
Start with the basics.

Clean air filter?
Clean fuel filter?
No leaks around carb inlet boots or manifolds?
Clean oil and filter? (It does have oil, right?)
Valves adjusted properly?
Carb fuel level correct?
Carbs properly adjusted and synchronized?

If the engine has been heavily modified and you ride in heavy traffic or flog it a lot, you may need an oil cooler.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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  • MFolks
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Re: kz1000e-1 overheating

03 Sep 2011 18:20
#474068
What brand of sparkplug being used? Proper heat range? I've had more than a few NGK's fail new right out of the box. Try Accel or Denso if you can get them.

www.gadgetjq.com/spark_plug_cross_reference_motorcycle.htm
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)

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  • KZ_Rage
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Re: kz1000e-1 overheating

03 Sep 2011 19:35
#474078
Check the color of the plugs, bet they are white.

A complete list of mods to the bike like air filter/pods, exhaust, valve, ignition, jetting, old boots or new, etc., would be best to get the proper advice.
1979 KZ1000E1 SOLD!
1984 KZ550F2 SOLD!
2006 ZG1000A6F (Totaled)
2001 ZRX1200R (Sold)
2001 Sprint 955i ST (daily rider)

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  • Patton
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Re: kz1000e-1 overheating

03 Sep 2011 23:53
#474103
Would assure timing advancer isn't stuck and is properly functioning.

Good Fortune! :)
1973 Z1
KZ900 LTD

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  • Hambo
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Re: kz1000e-1 overheating

05 Sep 2011 15:18
#474363
Hey guys,
I appologize for the lack of info. Hope this helps.

4-1 vance & hines exh
k&n pods
jets main 112.5 pilot 17.5
gas cap vents properly
new fuel filter
new carb boots/no leaks
recent oil and filter change
new intake valves and all valves ground
valve clearances within specs
fuel level ????
carbs manually synced
NGK b8es plugs
plugs tan in color
dyna s ignition
checked with timing light, advancer working

Attachments:

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  • KZJOE900
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Re: kz1000e-1 overheating

05 Sep 2011 15:34 - 05 Sep 2011 15:39
#474366
What year and model is your bike? Is it popping when you let off the throttle? 112.5 on the mains sounds like it may have never been rejetted for the 4-1's and pods. Which would account for it running hot. The spark plug color will tell you for sure.

Joe

Edit: Sorry didn't see the your quote about the plugs being tan in color.
Current project 76 KZ900 (This was a Vetter model)
76 KZ900
81 XJ550H SECA (Current Project)
82 XJ550R SECA
Past:
86 FJ1200
74 Z1900
72 CB450
Last edit: 05 Sep 2011 15:39 by KZJOE900. Reason: correction

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  • roy-b-boy-b
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Re: kz1000e-1 overheating

05 Sep 2011 15:59
#474371
I don't know what carbs came on the bike but I would go 20/117 or 20/ 120 on the jets. Roy
1979 LTD Street Fighter.1977 KZ1000

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  • Hambo
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Re: kz1000e-1 overheating

05 Sep 2011 16:39
#474377
The bike is a 1979 kz1000e-1
It ran great before I had to replace the front chain guide. As a result of the chain guide failure the cams rotated enough to bend all intake valves. Replaced those, ground valves and reset clearances.
Today I just re-checked the clearances and all are good except #1 intake. Would that cause the overheating?

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Re: kz1000e-1 overheating

05 Sep 2011 16:43
#474379
Hambo wrote: ...gas cap vents properly...new fuel filter...fuel level ????,,,NGK b8es plugs...plugs tan in color....

gas cap vents properly --- would test run with cap ajar.

fuel level --- should pass the "clear tube" test.

Perhaps fuel line kinked or clogged?

have an overheating problem. After not more than 5-7 miles it is very hot and starts to sputter unless I give more throttle -- am wondering why overheating would cause the engine to start sputtering. Would think the engine would start smoking, and maybe even begin first stages of seizure, but not necessarily accompanied by sputtering.

Brakes dragging?

Does bike roll coast freely when not under power?

Good Fortune! :)
1973 Z1
KZ900 LTD

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  • Hambo
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Re: kz1000e-1 overheating

05 Sep 2011 16:48
#474383
Hello,
The brakes do not drag, engine was not smoking, ran with cap open. Would the #1 intake valve not closing cause the overheating? The motor did seem hotter on the left side.

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