1978 kz1000a renew and revenge project

  • bry195
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Re: 1978 kz1000a renew and revenge project

23 Feb 2025 14:06 - 23 Feb 2025 17:55
#909329
I guess I could have did a better job at explaining what you see. In the sequences of pictures its starts with carb 1 then 2,3,and 4. Red in the AFR curve will be anything above 14.7, green is anything above 12. The sawtooth waveform is from giving it mid throttle and releasing over and over again.  

What you can see is that in the first set of pictures, carb 2 and 3 would go lean on mid throttle. I moved the clips 1 position down which lifts the needle all the way up on carb 2 and 3. The second round of 4 pictures shows all 4 carbs responding to the throttle by going to an AFR of slightly above 12. The concept is to have the bike idle at 14.7 for efficiency and enrichen to 12 for power. It looks like it worked out pretty well.

So in summary, Idle afr is yellow of something below 14.7. I give it throttle and it goes green, which is something above 12. It’s synchronized and responds to throttle like any other performance motor Ive had. I could take pictures of the plugs if anyone is interested in reading the salts.

Thank you gentlemen for the explanation and the manual. 
Last edit: 23 Feb 2025 17:55 by bry195.

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Re: 1978 kz1000a renew and revenge project

28 Aug 2025 17:14
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Re: 1978 kz1000a renew and revenge project

11 Sep 2025 14:22
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paint looks great. nice work. 
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Re: 1978 kz1000a renew and revenge project

21 Sep 2025 06:12
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Forks cleaned up, clear coated and rebuilt. New rotor, new wheel. I have also discovered that the forks are bent but someone had mounted them in a way that kept the wheel straight.
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Re: 1978 kz1000a renew and revenge project

Yesterday 13:38 - Yesterday 13:41
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The bike is able to be ridden so it’s time to start tuning WOT and mid on the carbs. Here is the status and suggested remedy that I will implement soon.
October 5 2025 (idle jet, main jet, Clip on needle)
#1-idle perfect, wot is 9.4 AFR, mid is rich (15,122, 2)
#2-idle perfect, wot is 9.4 AFR, mid is rich (12.5, 122, 1)
#3-idle is perfect, wot is 9.4 AFR mid is rich cruise is super lean (10, 122, 1)
#4-idle is perfect wot is 9.4 AFR mid is rich (10, 122, 2)
Remedy
take all mains to 117 jet
look at #3 low mid needle jet
 
Last edit: Yesterday 13:41 by bry195.

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