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1 st cylinder dont fire
- Fox
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16 May 2023 12:37 #884767
by Fox
1978 KZ1000-B2 LTD
1977 kz1000-B1 LTD
1 st cylinder dont fire was created by Fox
Hello,
The first cylinder dont work. The bike run on 3 cylinders.
carb is clean. I can see a spark from the spark plug when i test it. The spark plug have oil but no sign of start.
I suppose a worn valve guide because of the oil on the spark plug.
but can this cause a missfire ?
i think the spark plug would be black an fouled and not new and oiled …
The coils have 4 years. Dyna green.
to test the coils can i use a old kaw one mixed with a dyna one ?
best
f
The first cylinder dont work. The bike run on 3 cylinders.
carb is clean. I can see a spark from the spark plug when i test it. The spark plug have oil but no sign of start.
I suppose a worn valve guide because of the oil on the spark plug.
but can this cause a missfire ?
i think the spark plug would be black an fouled and not new and oiled …
The coils have 4 years. Dyna green.
to test the coils can i use a old kaw one mixed with a dyna one ?
best
f
1978 KZ1000-B2 LTD
1977 kz1000-B1 LTD
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- Wookie58
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16 May 2023 12:41 #884768
by Wookie58
Replied by Wookie58 on topic 1 st cylinder dont fire
Yes you can mix the coils to test as long as they are the same resistance (3-4 ohms) oil on the plug will cause a misfire as the voltage will travel to ground through the oil rather than jumping the gap (electricity is lazy)
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- Scirocco
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- Never change a running system
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16 May 2023 12:48 #884769
by Scirocco
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Replied by Scirocco on topic 1 st cylinder dont fire
Burn away the carbon and oil with a gas torch and than clean the spark plug with a brass brush.
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
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- Fox
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16 May 2023 12:51 #884770
by Fox
1978 KZ1000-B2 LTD
1977 kz1000-B1 LTD
Replied by Fox on topic 1 st cylinder dont fire
Ok but i should see some trace of ignition on the spark… i think i can see a little black color but just at the gap. Other than that the spark plug is like new …
1978 KZ1000-B2 LTD
1977 kz1000-B1 LTD
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- Nessism
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16 May 2023 13:16 #884772
by Nessism
Replied by Nessism on topic 1 st cylinder dont fire
Spark, fuel, compression.
If you have spark, the carbs are verified okay, that leaves compression.
Are the valve clearances in spec? Compression test.
Based on prevailing past history, I'd guess carbs, because many times people think their carbs are clean, however there could be an internal problem with the pilot circuit.
If you have spark, the carbs are verified okay, that leaves compression.
Are the valve clearances in spec? Compression test.
Based on prevailing past history, I'd guess carbs, because many times people think their carbs are clean, however there could be an internal problem with the pilot circuit.
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- Fox
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17 May 2023 16:19 - 17 May 2023 16:21 #884815
by Fox
1978 KZ1000-B2 LTD
1977 kz1000-B1 LTD
Replied by Fox on topic 1 st cylinder dont fire
Hello,
just an update to help if someone have this problem :
The spark plug was defective!. Purchased new (ngkb8es) but the spark was not blue and powerfull has other ones.
Note : i'm going to buy a good spark plug tester!
thank you for your help,
Fox
just an update to help if someone have this problem :
The spark plug was defective!. Purchased new (ngkb8es) but the spark was not blue and powerfull has other ones.
Note : i'm going to buy a good spark plug tester!
thank you for your help,
Fox
1978 KZ1000-B2 LTD
1977 kz1000-B1 LTD
Last edit: 17 May 2023 16:21 by Fox.
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- hardrockminer
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17 May 2023 18:28 #884820
by hardrockminer
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.
Replied by hardrockminer on topic 1 st cylinder dont fire
You may have gotten a knock off plug made in China.
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.
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- Bogie1
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23 May 2024 17:18 - 23 May 2024 17:27 #899594
by Bogie1
Mike Bogos
1978 Kawasaki 1000 LTD
1977 Kawasaki KZ1000 Project
1982 Suzuki 1100 L
1971 Rupp Roadster
1965 Olds 442 Conv
1970 Olds 442 Conv
Replied by Bogie1 on topic 1 st cylinder dont fire
I just had a very similar problem, after 10 Miles on my freshly rebuilt 77KZ1000 the engine started running bad, after some diagnosing I found the number 1 and two plugs were not firing. I replaced them with some old plugs that I knew did work and the bike ran great again. I will replace the two used ones with new ones.
all four of the plugs used in the rebuild were from a NEW 10 pack of NGK B8ES
So this brings up my question, Hardrockminer commented maybe they were Chinese Knockoffs. How do you tell?
They are marked NGK B8ES in a NGK box.
all four of the plugs used in the rebuild were from a NEW 10 pack of NGK B8ES
So this brings up my question, Hardrockminer commented maybe they were Chinese Knockoffs. How do you tell?
They are marked NGK B8ES in a NGK box.
Mike Bogos
1978 Kawasaki 1000 LTD
1977 Kawasaki KZ1000 Project
1982 Suzuki 1100 L
1971 Rupp Roadster
1965 Olds 442 Conv
1970 Olds 442 Conv
Last edit: 23 May 2024 17:27 by Bogie1.
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- TexasKZ
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23 May 2024 20:50 #899612
by TexasKZ
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
Replied by TexasKZ on topic 1 st cylinder dont fire
www.ngkntk.com/newsroom/blog/emea/fake-or-not/I just had a very similar problem, after 10 Miles on my freshly rebuilt 77KZ1000 the engine started running bad, after some diagnosing I found the number 1 and two plugs were not firing. I replaced them with some old plugs that I knew did work and the bike ran great again. I will replace the two used ones with new ones.
all four of the plugs used in the rebuild were from a NEW 10 pack of NGK B8ES
So this brings up my question, Hardrockminer commented maybe they were Chinese Knockoffs. How do you tell?
They are marked NGK B8ES in a NGK box.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
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