Reply To: GV650 FI 2002 – REGULATOR / RECTIFIER Instant overheat
Hey,
Sorry if this reply was too short but this came to my mind, as i was dealing with this a few days ago!
We got a GV EFi that stopped charging and we found the connectors melted , despite being a new stator! – However, it turns out the stator didn’t match the flywheel for whatever reason.
So to test it, we got a 337 code (no signal from pick up coil) , fine… We swapped it again with another stator , the bike ran, and the connector was replaced.
This was a 3 phase plug, so while the bike was running for 5 mins, the various Mosfet RRs we have on the shelf were all saying 14V , we put an inline fuse on the battery RR wires to be safe.
I kid you not, the Stator’s 3 phase wire was getting hottter and hotter to the point where , I wonder to myself , perharps the stator simply is internally shorting itself or it’s on the wrong flywheel (hence on certain models Hyosung sells stators with flywheels together) or the wires were too thin , mind you the connector is new and has nice brass colour pins , it was getting too hot.
I have not solved this yet as the bike was being stripped down in to a carb conversion instead (less electronics to worry about later for the new owner!)
This was a Delphi 2012 (the very early one) , so it still had some old daewoo electronics and ran fine on its black fuel pump.
Check your bike for:
- Wires getting warm ?
- Headlight wires getting too warm ?
- Smell the plugs for any signs of burns?
- Check the Fuel Pump Relay & Other Relays = If they start going funny, they will start taxing the stator back.
Just some ideas to try if i had not already mentioned
Your ODOMETER will probably stay that way as sadly i went through it myself, the old OEM RR briefly overspiked the whole harness, so it made things go a little haywire , except my ODO went to O miles , had to start over again (where it said 10,000 miles before) , likely ruined a battery or a capacitor inside the ODO board but i did not check at the time as the rest of the clocks where fine for the rest of the bike’s life.
Though 25-35V AC at 5K rpm isn’t good , it should be least 60V on each phase as per OEM ?
Though not possible to acquire anymore but the special tool used to read the ECU is Hyosung specific and they only ever gave it to dealers for warranty claims , so i was not fortunate to get one (I came on the Hyosung scene in 2015 circa , so Hyosung had already moved on to Delphi Electronics!) , hence you were not able to properly read the K-Lines of the dealer plug. We simply rely on the flashing sequences of the Fi light.
Daewoo as i know it , will flash red , while alternating 0 , Fi , 0 , Fi on the dash = Fuel system woes or ECU gone haywire.
If you don’t get error codes while it is running, that should be a good thing I hope
Delphi as i am on now, will stay red until i press start, once the bike fully starts, the red light goes away. It will flash briefly during a ride if there is issues with it.
If you read the service manual , make sure its an 09-11 as from 2013 onwards is Delphi , so error codes in newer models will be confusing where it doesnt apply to an older ECU.