I've got an old Harley 125 parts bike I want to get running but the electrical is a mess. I want to hotwire the ignition but I don't know how. I'm ditching everything: ignition, headlight, taillight, ECU. The engine has 3 wires coming out of it, red, black, green. There is an ignition coil. Please help :-\
How to hotwire ignition?
- Thread starter DANP
- Start date
SONICJK
Reminds me of...me No, I'm sure of it. I hate him
Of course not but your cocky ass attitude when you're coming to ask questions is obnoxious.
You said you removed a ecu. First of all that bike doesn't have an ecu but if it did it wouldn't run without it.
All you need electrical wise to run is is spark, so you'll need power to the pouts and power to the coils and you're good.
You said you removed a ecu. First of all that bike doesn't have an ecu but if it did it wouldn't run without it.
All you need electrical wise to run is is spark, so you'll need power to the pouts and power to the coils and you're good.
The bike does have an ECU, its the black box pictured. If it wont run without it then I guess I will have to do some wiring. I just noticed it is missing the green (ground?) wire coming off the magneto, looks like it was yanked out. Is this wire necessary for running without battery?
DANP said:
Most of the time these two things are something you might want to keep on the bike, you know, so it will start...
If you are after just a kick start bike with no off switch or other electrics then you have a bit of work to do.
Get a multimeter and a friend (if you have any with an attitude like that) and test which wire puts out a pulse when the bike is kicked over. Connect that wire to the coil and see how you go.
Worked for me on my old Z50.
pterodactyl
Been Around the Block
How old is that bike? I doubt its a ECU! Could it be some kind of voltage regulator / rectifier
pterodactyl
Been Around the Block
lol yeah no doubt and something has to read all them sensors
Come on man, you come in asking for help and then act like you know what you are doing.
How the hell does the country of origin make any difference.
You sir, are beyond help as you refuse to hear it.
Change your attitude and you might get your bike running.
How the hell does the country of origin make any difference.
You sir, are beyond help as you refuse to hear it.
Change your attitude and you might get your bike running.
AgentX
Over 1,000 Posts
Hmmm. "Ride." Interesting point, inaccurate as it may be on the jap part.
If you can't figure out how to wire up a 2-stroke single with no lighting, ignition switch, or accessories, it's no problem. Someone here can help you. But don't be a fuckstick or it goes like this.
Now, what you have appears to be an "electric control unit," not an "engine control unit' (AKA ECU, which actually controls your engine.) Maybe it's a power distribution block, of some kind, maybe with relays or something in it.
Who knows? You'll need a wiring diagram and/or to trace the wires themselves to where they go to discern their function. Their color means little on a 44 year old Italian-made import. (er, "American Iron," sorry.) You *can* probably ditch the black box if you aren't going to run anything but the ignition circuit..because it's not an "ECU," even though the nomenclature begins with the letters "e" "c" and "u". But maybe not. So start over, don't be a prick, and maybe someone with more knowledge can help out.
If you can't figure out how to wire up a 2-stroke single with no lighting, ignition switch, or accessories, it's no problem. Someone here can help you. But don't be a fuckstick or it goes like this.
Now, what you have appears to be an "electric control unit," not an "engine control unit' (AKA ECU, which actually controls your engine.) Maybe it's a power distribution block, of some kind, maybe with relays or something in it.
Who knows? You'll need a wiring diagram and/or to trace the wires themselves to where they go to discern their function. Their color means little on a 44 year old Italian-made import. (er, "American Iron," sorry.) You *can* probably ditch the black box if you aren't going to run anything but the ignition circuit..because it's not an "ECU," even though the nomenclature begins with the letters "e" "c" and "u". But maybe not. So start over, don't be a prick, and maybe someone with more knowledge can help out.
