Forums 🚥 PIT STOP 🔧 Hyosung Technical Help [Bike Mod] GV650 & GT650 : Modification of the TOS sensor (Tip Over Sensor Mod) Reply To: [Bike Mod] GV650 & GT650 : Modification of the TOS sensor (Tip Over Sensor Mod)
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According to the manual – The RO Switch (Roll Over) aka. (TOS Tip Over Sensor) is under the seat.
It should be near the battery, if you read the above ^ pdf file, you would have a visual idea of where it is.
According to the service manual (EFI), this is what it says:
“CHE” : The LCD panel ① indicates “CHE” letters when no communication signal from the ECU is received for 3 seconds.
C23 = RO/TOS Switch faulty.
For a more detailed explanation. Download the link below and go to pages:
#27, #34, #47, #66 ,
– Service Manual Link –
Personally I don’t have a TPS sensor on mine, if it did, i’d find ways to get rid of it myself. But i have no experience in using other brand manufacture TOS sensors on a GV650
However, the above ^ book at the top, does mention that you may use other brands from “EFi/Ei” (injected bikes.) Designs may also vary too.
This is the most recent TOS sensor hyosung uses that I know dealers to be stocking up,
Hope this info helps, let us know how you get on!
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