F1 light on and flashing on screen
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Bike Model = : 2013 GT650R
Hey there
New to hyosung bikes
Struggling with the bike its as if this bike has a deep hatred for me 🤣
So i bought the bike and it had a f1 light on and would crank the motor but wouldn’t prime the fuel pump and no spark ! (got a new second hand ecu and the bike started up) bike revd up and i could drive it but first gear 7000rpm it almost reaches 50km/h (cant see F1 flickering on speedo) and it had a heavy rattling in the front of the bike ! I took it apart and cleaned air box, injectors, plugs, fuel pipes cleaned throttle bodys and put in a new fuel pump and a new fuel pump relay and main fuse. Put the bike back together, tried to start and just swings the fuel pump is priming but not starting so i suspected the coil where i was busy, i unplugged it and put on a spare coil pack i have, bike started for 3 seconds then died and won’t start again i swung the battery flat and it is currently on charge
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Stator likely the culprit? If its not recognized by the ECU, the sparks won’t happen and also the ECU primes the pump directly.
Also look at your clutch switch (don’t bypass it as fake neutrals can happen) , neutral sensor ? , Side Stand Switch (bypassing it is OK as it is a very annoying object) = These would stop the ECU priming the pump or sending sparks.
If not, you will have to strip the bike down and carefully go through the entire harness making sure there is no dead circuits from one end to the other end of each wire.
Contact Cleaner helps keep the connectors in good condition with air compresor jets on the wire connectors.
ECU = Just blow air and don’t put any liquids on it.
Hopefully we get somewhere?
Also check your RO-SENSOR (Tip Over Sensor) = If bike can’t sense it or thinks you fell down, it will cut sparks off.
This PDF by another member helps go in more detail also:
While the harness is apart , get a meter and use the service manual on this forum to test every sensor connected to the bike (ie. if something says 0 ohms where the manual wants 20 ohms, that object is either faulty or connectors are bad/too oxidized)
Kill Switch Plug (where you press start) is also crucial, make sure that right handle bar switch cluster is fully cleaned out including the contacts inside the switch rockers and the actual black plug under the airbox
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