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Thanks to Doug and the other responders who gave useful info.
Now I’m just scratching my head over having a K22 needle. Was that ever stock for the FR125? Since I have a VHSB 34 “QD” carb, it looks like I could just swap needles if I ever wanted to do RMax.
The only needles to come stock in a Rotax are the K27 and the K98. Looks like some one was trying to find a leaner needle to get better low rpm pull. If you decide to go RMax, I would look at other parts such as the slide. It may be changed also. Many put a 45 slide in them. The only slide legal in Rotax is the 40.
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