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TOPIC: Carb Jetting for a removed baffle?

Carb Jetting for a removed baffle? 13 Mar 2019 19:16 #800309

  • WarrensKZ
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On my 77 Kawa I removed the baffle because my sons ride with me and wanted more obnoxious noise.

As a rule of thumb - if there is such a thing - would that require a larger main jet or pilot.?

Stock jetting on my Mikuni VM24s is 102.5 Main, 15 pilot. I was told that I should increase the Main up to sizes to 107.5 to accommodate the removed baffle.

Thoughts on this are appreciated

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Carb Jetting for a removed baffle? 13 Mar 2019 20:24 #800312

  • SWest
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You'll lose power in the top end.
Steve
Z1b1000 1975 Z1b
Opinions expressed by me do not reflect those of the the staff or members
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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Carb Jetting for a removed baffle? 14 Mar 2019 01:48 #800318

  • kevski
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There is no magic formula, but you need to go up on both circuits at least one size, and then up in increments of one at a time on each circuit separately until you get there, also you may have to raise or lower or even shim the jet needless, everything else such as valve lash, ignition timing, cam chain adjustment need to be correct also, all this needs to be done if you are going to do the job properly.

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Carb Jetting for a removed baffle? 14 Mar 2019 03:01 #800320

  • Warren3200gt
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Kevski is right, no magic formula but a dyno will take some of the trial and error out of it.
PS you have mail Kev.
75 z1b, 77 z650 b1, 77 z650 b1 period custom, 77 z1000 a1, 82 z1100 elr, 89 zxr750h1

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Carb Jetting for a removed baffle? 14 Mar 2019 15:07 #800353

  • KZB2 650
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Thinking it would defently be too lean with the jets you have and mine with different carbs 24s and 29mm smooth bores and playing with the jetting never seemed to run quite as good as with the baffle in. Too Easy to piss off the cops and folks in your area too.
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket....
The following user(s) said Thank You: Nessism

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Last edit: by KZB2 650.
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