Quote:

...I think a case could be made for just the oposite effect. If the slide opens early, air velocity might not be sufficient to pull the additional fuel needed to maintain proper mix from the metering circuit. In that case, it would run lean...



Jack, I don't follow that logic. The only place this should even be a concern is on low speed transition, in which case the elevated slide/needle theoretically caused by a too-light spring could induce a transient rich condition. And that is just theoretical. Presuming the Kawi lighter springs maintain sufficent tension then it won't matter, or it won't matter enough to be of concern. I doubt that a dyno run with this mod is going to reveal anything remarkable regarding A/F, provided the springs have enough rate in them.