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Bill, great to see your still around, helpling these people out, getting and keep these skis running. I want to get right to the point. Where did you get this info on rebuilding, jetting and tuning the carbs? Did you take this into directly from the Mikuni manual, or did you get it from the Seadoo carb rebuild section of our manuals.
The reason I ask is simple. If you've ever taken these carbs about, when you removed the metering plate, expose the jets, you'll see the smaller jet has three areas you can see spray (I use electric spray), come up right near the throttle plate. The discrepancy I see is on the "high speed" jet. This is actucally, not a jet. If you remove it, then squirt cleaner through it, you'll find it'a actually a "bypass". The Seadoo calls for this just to be closed, set at zero. Now, if you do, and squirt material through it, you'll actually see fluid come up inside the venturi area. If your not to sure, or if I have given you something to thing about, download the Mikuni carb manual, and it will show the exploded view of that area. It's not actually a jet, just a bypass. I'd hope you don't take my word for it, but please, get the Mikuni carb manual, and look it up for yourself.