ChinaRiders Forums - View Single Post - KPX 250 Stalling occasionally? Feedback from owners appreciated!!

Thumper · 08-21-2023, 09:06 AM

TPS sensor does seem to have an adjustment slot. But they don't seem to have an adjustment procedure other than try a different position (!) and they don't discuss what the effect of adjustment is, or how to decide where to place it.

My guess is that a similar adjustment slot exists on a Honda, or other motorcycle, and that the adjustment procedure is known for that. It might even be described in a manual.

I doubt it is changing the enrichment curve. The throttle body position feedback must inform the EFI software the exact position. This information, combined with temperature, twist grip throttle position and perhaps rpm result in how much fuel is spraying. These operate on the edge (lean) and so it makes sense that TPS position is sensitive.

08-21-2023, 09:06 AM	#4
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,320	TPS sensor does seem to have an adjustment slot. But they don't seem to have an adjustment procedure other than try a different position (!) and they don't discuss what the effect of adjustment is, or how to decide where to place it. My guess is that a similar adjustment slot exists on a Honda, or other motorcycle, and that the adjustment procedure is known for that. It might even be described in a manual. I doubt it is changing the enrichment curve. The throttle body position feedback must inform the EFI software the exact position. This information, combined with temperature, twist grip throttle position and perhaps rpm result in how much fuel is spraying. These operate on the edge (lean) and so it makes sense that TPS position is sensitive. __________________ -2022 5 speed Templar X Orange, OEM 51T rear sprocket, 14T front sprocket -NOS 2020 KTM 250SX (2-stroke motocross), less than 10 hours on it Last edited by Thumper; 11-03-2023 at 04:25 AM.
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