Bike port

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01 Jun 2022 06:48 #867973 by SWest

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02 Jun 2022 11:37 #868055 by SWest
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Much better. Now I have something to work with. 
Steve

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03 Jun 2022 06:27 #868116 by SWest

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03 Jun 2022 12:07 #868156 by SWest

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04 Jun 2022 09:56 #868211 by SWest

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04 Jun 2022 11:18 - 04 Jun 2022 11:18 #868224 by Mikaw
Replied by Mikaw on topic Bike port
I’m always wanting to learn. How does drilling out the emulsion tube holes help richen the main circuit. Isn’t it restricted by the main jet no matter how large those holes are? Looking a a cutaway view of the carbs I’d guess drilling out the tube could add more air, (lean) but again that is metered buy the size of the main air jet in the carb throat. 

 

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
Last edit: 04 Jun 2022 11:18 by Mikaw.

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04 Jun 2022 11:45 #868226 by SWest
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I opened up two of the holes Miller drilled in each to lean out the mixture. Then I added 1.2 air corrector jets that made it run too lean. If I resolder the holes closed it should be running with the stock holes and the recommended air corrector jets. That's what I meant by richening them up.
Steve

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05 Jun 2022 21:23 #868331 by daveo
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Steve, I'm running BS30/97-1.1 size Air Jets with #35 Pilot and 130 Main Jets in my 82 KZ1135 engine.  The carbs are RS34's.
With BS30/97-1.2 size Air Jets, she's lean, whereas with 1.0 size she turns rich.
Those little buggers make quite a difference, but the size needs to be correct.  Been through lots of trial and error, and I'm getting pretty close I think.  The fuel screws are turned out 3/8 or so.

 


1982 KZ1100-A2

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06 Jun 2022 11:36 #868363 by SWest

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06 Jun 2022 11:55 #868366 by Mikaw
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Daveo.  Wow. That thing must run like a scalded cat. Plugs look perfect.

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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06 Jun 2022 12:47 - 06 Jun 2022 13:03 #868368 by daveo
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Daveo.  Wow. That thing must run like a scalded cat. Plugs look perfect.



The old three-legged neighborhood dogs keep trying, but they can't keep up with me anymore.

Gotta put credit where it's due.  After Steve started talking about sticking #35 pilot jets in his carbs, I figured it was time to jump out of the 20's myself to see what could happen.  Thanks again, Steve.
 
Been having nasty dreams of 37.5's lately, and don't quite know how to handle them.
Two things I do know, is that I have yet to reach the no return point, and these engines were built like a tank.

1982 KZ1100-A2

Last edit: 06 Jun 2022 13:03 by daveo.
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06 Jun 2022 13:52 - 06 Jun 2022 13:53 #868373 by SWest
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Rule of thumb, put at least 100 miles on them before making any adjustments. I'll check the plugs tonight and see what I think. The exhaust note is changing so I'll run it this way for a while. 
Steve
Last edit: 06 Jun 2022 13:53 by SWest. Reason: sp
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