Reply To: Dies on idle (after 1-3 minutes) – GV250
Cold starts where not an issue, and sometimes when its hot, it dies, then i have to continuously crank to get it going which damaged the starter motor in the end , so replaced the starter motor too and its relay.
You could check the service manual for the EFi models to check resistance levels needed for the coils and make sure your coils match (I can’t confirm what the SV650 ones are as i forgot!)
However Hyosung GV650 carby , GT650 carby & GT250 (some efi early models) did use the Mitsubishi Japan SV650 coils (It will have the Mitsubishi logo imprinted on it)
Some GV25o EFi models used GV650 smaller coils – So Hyosung has been known to interchange coils across all their models as long the specific ECU accepts it.
Speaking of temperature, test your ET sensor , here is a similar topic about it:
If the bike had brand new parts (or used parts from a verified working donor) – you should not have problems. This means now, you will spend some time with your multi-meter to test every single sensor on the bike and verify that it is still spec according to the manual.