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Spark, fuel and compression but won't start
- travism
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27 Feb 2017 14:49 #755373
by travism
Spark, fuel and compression but won't start was created by travism
Hi guys I have a 1980 kz440 it has good compression gets fuel and spark but it still won't start, does anyone have any idea what it could be? Thanks for the help
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- Nessism
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27 Feb 2017 15:24 #755377
by Nessism
Replied by Nessism on topic Spark, fuel and compression but won't start
Have you gone through the carbs completely and clean all the passages and jets?
Is the bike stock? Reason for mentioning is because if for some reason you are trying to start the bike without the airbox or with pods you may struggle because the mixture will be all wrong.
Is the bike stock? Reason for mentioning is because if for some reason you are trying to start the bike without the airbox or with pods you may struggle because the mixture will be all wrong.
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- travism
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27 Feb 2017 16:25 #755385
by travism
Replied by travism on topic Spark, fuel and compression but won't start
I swapped the original carbs with vm30s with pod filters, the fuel is coming out of the carbs but it doesn't seem like it's getting sucked into the engine
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- TexasKZ
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27 Feb 2017 16:43 #755389
by TexasKZ
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
Replied by TexasKZ on topic Spark, fuel and compression but won't start
If fuel is running out of the carbs, either the fuel level is too high, or the float valves are not sealing due to dirt, corrosion or a mechanical blockage. This needs to be addressed before trying to start it again. Also, if this model has a vacuum operated petcock (fuel valve) it has likely failed as well. It will need a careful cleaning and its rubber parts will need to be replaced. If you know of somebody who has successfully made this carb swap on a 440, you may be able to use their jetting as a place to start.
Are the carb holders in really good shape? ie, pliable and without surface cracks? Do the new carbs fit snugly in them? If not, they will need to be replaced.
As already mentioned, the carbs need to be spotless inside, and every one of those tiny passageways need to be perfectly clear. A can of aerosol cab cleaner, some really small wire and compressed air will often do the job. If they are really cruddy, an ultrasonic cleaning may be the only solution.
Are the carb holders in really good shape? ie, pliable and without surface cracks? Do the new carbs fit snugly in them? If not, they will need to be replaced.
As already mentioned, the carbs need to be spotless inside, and every one of those tiny passageways need to be perfectly clear. A can of aerosol cab cleaner, some really small wire and compressed air will often do the job. If they are really cruddy, an ultrasonic cleaning may be the only solution.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
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- travism
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27 Feb 2017 17:05 #755391
by travism
Replied by travism on topic Spark, fuel and compression but won't start
Thanks! Im about to order new rubber boots and I didn't even think about adjusting the fuel level on the carbs (I'm new to fixing bikes) and I'm going to look into new jets for it
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- Barry2
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27 Feb 2017 22:53 #755407
by Barry2
1976 KZ900
Replied by Barry2 on topic Spark, fuel and compression but won't start
Getting spark at the right time?
1976 KZ900
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- Scirocco
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- Never change a running system
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28 Feb 2017 00:42 #755410
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 Spark, fuel and compression but won't start
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
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- travism
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01 Mar 2017 22:21 #755560
by travism
Replied by travism on topic Spark, fuel and compression but won't start
i should be, i did the ignition timing
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- travism
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01 Mar 2017 22:24 #755561
by travism
Replied by travism on topic Spark, fuel and compression but won't start
i bought one online acouple days ago and it just came in
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- Tyrell Corp
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02 Mar 2017 00:55 #755563
by Tyrell Corp
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
Replied by Tyrell Corp on topic Spark, fuel and compression but won't start
Uk Haynes are pretty good too, with workarounds if you don't have all the factory tools.
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
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