Reply To: GV 250 rich consumption problem

[♠️ M77]

Oxygen Sensor in the exhaust
Engine Temperature

These two can affect how much fuel mixture the ECU provides to the injectors.

Have you tested them ?

I would also keep an eye on the ISCV unit  (idle speed control valve)

Try the TPS though and let us know  and use  E5 Fuel  (RON 99)  is best.   Here in EU with E10  (10+ % ethanol content), the bikes hate it.   Less ethanol is better.

That’s why our GOV in UK advises us for older motorcycles to keep using E5 (aka. Shell VPlus Premium)  or pure unleaded (rare)
https://www.gov.uk/guidance/e10-petrol-explained