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I have an 06 KX250 with a Keihin.  When working on cleaning the carb this last time, it occurred to me that I have no idea what the TPS and Solenoid must do and when. I don't think the TPS effects timing, but I'm not sure. I've always had fouling problems without warning up the bike. If I do a long warm-up, it still needs "cleaned out" with WOT under load for a bit. I think deleting the solenoid circuit might help, but I want to understand the Why behind it all. 🙂

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