Starting problem – Hyosung gv650 2006
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Bike Model = : Hyosung gv650 2006 carburetor model
Hyosung gv 650 2006. Carb model.
I purchased this bike after it stood in a field for fifteen years and duly restored it and engine ran ok except a misfire which was resolved by fitting a new coil.
I fitted a crashbar and welded new brackets to the frame and now no spark !
I forgot to disconnect the battery!
I have replaced the stator and rectifier but still no spark!
Checked all fuses and all connections but now thinking the cdi/ ecu might have been damaged!
Any ideas? -
Quoting from your other topic:
Bike Model = : Hyosung gv650 2006 carburetor model
I have a problem with bike not starting I think it’s a possible cdi unit problem
My question is
My cdi unit says. BB7725-1 5K07
I found one the same make of cdi and same model of bike but it’s a 2007 year bike the number of the CDI unit on this is BB7725-1 6F14
The last 4 numbers/letters are different what are these representing and would it be compatable for my 2006 model
I would say all carby GV650 use the same CDI unit
You may need to remove the harness and test all pins to find which wire has been shorted and try to patch it up.  (You said it won’t spark anymore , sounds like something LIVE touched the frame and shorted a wire (burn a wire somewhere)
If the CDI blew, you will need another one.
// Meditation doesn't mean you have to sit still....
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Quoting from your other topic:
Bike Model = : Hyosung gv650 2006 carburetor model I have a problem with bike not starting I think it’s a possible cdi unit problem My question is My cdi unit says. BB7725-1 5K07 I found one the same make of cdi and same model of bike but it’s a 2007 year bike the number of the CDI unit on this is BB7725-1 6F14 The last 4 numbers/letters are different what are these representing and would it be compatable for my 2006 model
I would say all carby GV650 use the same CDI unit You may need to remove the harness and test all pins to find which wire has been shorted and try to patch it up. (You said it won’t spark anymore , sounds like something LIVE touched the frame and shorted a wire (burn a wire somewhere) If the CDI blew, you will need another one.
if I take some photos of the unit and the wires could you give me some advice on how to test it please
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Quoting from your other topic:
Bike Model = : Hyosung gv650 2006 carburetor model I have a problem with bike not starting I think it’s a possible cdi unit problem My question is My cdi unit says. BB7725-1 5K07 I found one the same make of cdi and same model of bike but it’s a 2007 year bike the number of the CDI unit on this is BB7725-1 6F14 The last 4 numbers/letters are different what are these representing and would it be compatable for my 2006 model
I would say all carby GV650 use the same CDI unit You may need to remove the harness and test all pins to find which wire has been shorted and try to patch it up. (You said it won’t spark anymore , sounds like something LIVE touched the frame and shorted a wire (burn a wire somewhere) If the CDI blew, you will need another one.
if I take some photos of the unit and the wires could you give me some advice on how to test it please
I can’t work out how to attach a photo
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Should be a Wire Pinout Diagram on the forum , search “Pin out” in the site , another member did a job detailing what each wire does and it is EFI GT650 , but some wires are also shared with carby GV650
There is also a service manual on the forum, download the one that matches your bike as it should explain how to check your CDI unit and wiring diagram in the last pages of the GV650 manual
To attach photos click the “green add media” button from your PC or Phone to attach a photo.
If an error comes up, tell us the “error” and i will fix the errors on the site.   I will also test with another account to upload images.
If you see image below, it means it was working for me.
// Meditation doesn't mean you have to sit still....
-
Should be a Wire Pinout Diagram on the forum , search “Pin out” in the site , another member did a job detailing what each wire does and it is EFI GT650 , but some wires are also shared with carby GV650 There is also a service manual on the forum, download the one that matches your bike as it should explain how to check your CDI unit and wiring diagram in the last pages of the GV650 manual To attach photos click the “green add media” button from your PC or Phone to attach a photo. If an error comes up, tell us the “error” and i will fix the errors on the site. I will also test with another account to upload images. If you see image below, it means it was working for me.
on my friends multimeter on the ohms setting is 3 positions 200,2000 & 20k which setting to check the cdi
Thank you for the help bro
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Should be a Wire Pinout Diagram on the forum , search “Pin out” in the site , another member did a job detailing what each wire does and it is EFI GT650 , but some wires are also shared with carby GV650 There is also a service manual on the forum, download the one that matches your bike as it should explain how to check your CDI unit and wiring diagram in the last pages of the GV650 manual To attach photos click the “green add media” button from your PC or Phone to attach a photo. If an error comes up, tell us the “error” and i will fix the errors on the site. I will also test with another account to upload images. If you see image below, it means it was working for me.
on my friends multimeter on the ohms setting is 3 positions 200,2000 & 20k which setting to check the cdi Thank you for the help bro
It should be on the service manual ?
// Meditation doesn't mean you have to sit still....
-
Should be a Wire Pinout Diagram on the forum , search “Pin out” in the site , another member did a job detailing what each wire does and it is EFI GT650 , but some wires are also shared with carby GV650 There is also a service manual on the forum, download the one that matches your bike as it should explain how to check your CDI unit and wiring diagram in the last pages of the GV650 manual To attach photos click the “green add media” button from your PC or Phone to attach a photo. If an error comes up, tell us the “error” and i will fix the errors on the site. I will also test with another account to upload images. If you see image below, it means it was working for me.
on my friends multimeter on the ohms setting is 3 positions 200,2000 & 20k which setting to check the cdi Thank you for the help bro
It should be on the service manual ?
hi bro we have tested everything with the multimeter and have found the coil lead cap where the spark plug slots into there is no reading from that so we tested the lead end to end (ok)
But plug the cap to the lead and nothing so next we tried the cable with the spark plug in without the cap and there was a blue spark there is a resistor in the cap can the bike run ok if we get caps without the resistor in These are new coils and leads
He did welding on the bike and forgot to unplug the battery so we were thinking first it was a cdi problem but now it’s looking more like the caps
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