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jetting after exhaust installation

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06 Oct 2009 08:23 #325805 by Paul K
jetting after exhaust installation was created by Paul K
hi, i have slip on exhausts on my '76 kz400d. i hacked off the original silencers b/c they were rotten. do i need to re-jet the carbs? and if so, do i go leaner or richer? more/less back pressure = rich/lean? how does that work?

pk

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06 Oct 2009 08:37 #325808 by JMKZHI
Replied by JMKZHI on topic jetting after exhaust installation
I would look inside the mufflers & compare them if possible.
Check to see if they appear to be about the same.
If the new ones seem to be less baffled, then there would be less back pressure, so they might flow more air which would make the bike run more lean.

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06 Oct 2009 15:01 - 06 Oct 2009 15:02 #325859 by bountyhunter
Replied by bountyhunter on topic jetting after exhaust installation
If they are way louder than stock, you may need richer jets. If it runs good and the plugs are the right color, no worries.
1979 KZ-750 Twin
Last edit: 06 Oct 2009 15:02 by bountyhunter.

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