Reply To: Bike stalls at steep climbs & after long idle periods GV250 2013 EFI [SOLVED]
From your google drive image , 2_1 , 2_1 ,2_1 in that sequence is = Intake air temperature sensor
This is the sensor on the airbox itself. To diagnose this, go back to the service manual and search “C21” code, there is a diagram they wrote on how to test this.
Also it would be very wise to get compressed air (air only!) and blow every connector on the bike clean, so you have to find a day where you strip the bike down and take your time, remember where everything was or label the plugs if you want.
No liquid cleaners on the ECU sockets whatsoever, that is the most sensitive and most infamous ECU that plagued the early Daewoo GV250 models, so much that Hyosung moved on and switched to the Delphi Electronics.
So look after that ECU like your life depends on it and if you have to , buy a few fork gaiters , yes fork gaiters , and use them to hide plugs away from exposures of the road / rain / salt etc..
Use a “tiny” drop of contact cleaner on every plug you find EXCEPT the ECU plug! – Leave to dry overnight.
Get a can of “ACF50” , apply this in every plug you can find , EXCEPT the ECU plug again. (This is oxidization protection / anti rust measure)
Hopefully we get some progress ? keep us posted!