Author Topic: 1975 CB750 Build! "Kona" - Sold and gone. (Read 70354 times)

Ravie · « **Reply #350 on:** June 14, 2015, 03:50:02 PM »

I just want to say for the record... Just because you think wiring makes sense, doesn't mean it does.

That brown wire goes to the tail light. I don't know why...I can't find anything in the wiring diagram to show that the taillight gets power from up front or what wire should power it.

When I power everything on...I get no headlight but the left turn signal is on all the time...which is interesting because I realized I don't have the ground wires hooked up for the front lights because of my custom headlight and turn signal mounting.

Ugghhhh.

And in the meantime I apparently have no friends capable of helping me lift an engine into a bike frame.

edwardmorris · « **Reply #351 on:** June 14, 2015, 04:45:56 PM »

Quote from: Ravie on June 14, 2015, 12:31:24 PM

There seems to be a straggler in my bucket. I see no other brown wire in here and i dont see this brown wire on any of the wiring diagrams. It is solid brown, no stripes. Comes out of the main harness.

Sent from my LGLS740 using Tapatalk

\
http://forums.sohc4.net/index.php/topic,126735.msg1694268.html#msg1694268

Ravie · « **Reply #352 on:** June 14, 2015, 04:49:20 PM »

You rock. Thanks!

Sent from my LGLS740 using Tapatalk

sethmcalister · « **Reply #353 on:** June 14, 2015, 05:41:42 PM »

Since you are both using the emgo harness, where are you guys getting power to he taillight from? I had a thread going because when I jump brown to black I have issues with my blinkers staying on. When the jumper is unplugged, my blinkers work like they should, but no taillight.

Sent from my A0001 using Tapatalk

Ravie · « **Reply #354 on:** June 14, 2015, 06:27:08 PM »

Hmm, from a single brown/white wire.

Oh. Um... this.

Sent from my LGLS740 using Tapatalk

Ravie · « **Reply #355 on:** June 15, 2015, 04:16:14 PM »

Oh heck yea. Thanks to Nick for selling me this badass mustang seat he had customized.

Sent from my LGLS740 using Tapatalk

Ravie · « **Reply #356 on:** June 15, 2015, 08:54:05 PM »

Installed lots of stuff tonight.

- Got the sprocket and chain on and adjusted and torqued the rear axle
- Installed the new seat
- installed the speedo and tach drive cables
- installed the carbs
- installed the coils
- installed the oil filter/housing
- soldered connectors to the rear tail lights where I had twisted some new leads on I stole from my junk harness
- Just for S&G's I checked the engine to frame ground - All good.

Need to figure out this wiring mess. Plenty of stuff left to do, for sure.

evanphi · « **Reply #357 on:** June 16, 2015, 05:23:54 AM »

Follow the colours! Take your time and be meticulous.

Ravie · « **Reply #358 on:** June 16, 2015, 07:08:21 AM »

I thought I had but this wiring harness is causing me hell. I have many of the same issues Rafi is having over in the ice cream build.

Ravie · « **Reply #359 on:** June 16, 2015, 07:36:07 AM »

Playing with the wiring this morning... disconnected the wire I thought went to only the tailight...but the tailight was still lit. Tried to honk the horn in the first on position and blew the 5 amp tail light fuse.

Jeebus feckin Krisp. This is shyte.

calj737 · « **Reply #360 on:** June 16, 2015, 07:37:35 AM »

And people wonder why I spend $300 on an M-Unit and make a custom harness

Ravie · « **Reply #361 on:** June 16, 2015, 07:39:39 AM »

haha. Yep.

Oh, and I still have no headlight.

70CB750 · « **Reply #362 on:** June 16, 2015, 07:40:33 AM »

Quote from: Ravie on June 16, 2015, 07:36:07 AM

Playing with the wiring this morning... disconnected the wire I thought went to only the tailight...but the tailight was still lit. Tried to honk the horn in the first on position and blew the 5 amp tail light fuse.

Jeebus feckin Krisp. This is shyte.

Gets expensive checking wires by randomly connecting and waiting for fuse to blow.

No secrets to wiring, just schematics and ohmmeter.

Ravie · « **Reply #363 on:** June 16, 2015, 07:50:55 AM »

I have two wiring diagrams and a multi meter. I'm not randomly connecting things, I'm following the schematics. This harness has connectors on it that don't even exist in the wiring diagram.

Sent from my LGLS740 using Tapatalk

Tews19 · « **Reply #364 on:** June 16, 2015, 09:16:38 AM »

Ravie do you need a headlight? I have one you can have for free

edwardmorris · « **Reply #365 on:** June 16, 2015, 09:18:27 AM »

Quote from: sethmcalister on June 14, 2015, 05:41:42 PM

Since you are both using the emgo harness, where are you guys getting power to he taillight from? I had a thread going because when I jump brown to black I have issues with my blinkers staying on. When the jumper is unplugged, my blinkers work like they should, but no taillight.

Sent from my A0001 using Tapatalk

Mine may not be an EMGO one Seth, it worked out perfectly and the only REAL issue there was, wasn't even a part of the harness. The K2 has a simpler wiring towards the rear, and only one oddity at the front, so overall it wasn't bad to hook it all up. Everything was accounted for except for the extra brown wire, which is only for the Euro bikes.

My taillight had always been working, I was dumb enough to not go behind the bike and take a good look. It is powered by the brown/white wire at the rat's nest, followed by the brown wire to the tail light, and these are connected THROUGH THE KEY SWITCH, so that connection isn't so obvious. The winkers, at least from my experience, its best to get them fully operational first then debug the rest.

Quote from: Ravie on June 16, 2015, 07:08:21 AM

I thought I had but this wiring harness is causing me hell. I have many of the same issues Rafi is having over in the ice cream build.

Turned out to be zero issues with the harness itself, the one issue was outside of the harness. So you're troubles aren't the quite the same as mine

Quote from: Ravie on June 16, 2015, 07:50:55 AM

I have two wiring diagrams and a multi meter. I'm not randomly connecting things, I'm following the schematics. This harness has connectors on it that don't even exist in the wiring diagram.

Sent from my LGLS740 using Tapatalk

Save the ones that don't match up for the very end. Give this a try

http://forums.sohc4.net/index.php/topic,110411.0.html

Ravie · « **Reply #366 on:** June 16, 2015, 12:05:07 PM »

That sounds like mine. Thanks!

Sent from my LGLS740 using Tapatalk

Ravie · « **Reply #367 on:** June 16, 2015, 10:06:47 PM »

That thread was magical.

I *think * I've got it licked.

Sent from my LGLS740 using Tapatalk

Ravie · « **Reply #368 on:** June 17, 2015, 07:33:28 PM »

Okay guys, I am going to be ready to fire this thing tomorrow. To get oil pressure should I just kick it over with the ignition off or should I take off the plug wires and just crank it for a little while?

Also, does it matter if the exhaust is on? I know it will be loud but any issues otherwise? I suppose I could install it.....

Sent from my LGLS740 using Tapatalk

calj737 · « **Reply #369 on:** June 17, 2015, 07:41:07 PM »

key off, kick it a bunch. Put your exhaust on, it will help it run a little better.

Ravie · « **Reply #370 on:** June 17, 2015, 07:43:51 PM »

Ok. Yeah its easy enough. Will do.

Sent from my LGLS740 using Tapatalk

Ravie · « **Reply #371 on:** June 17, 2015, 07:55:42 PM »

Not bad lookin, eh?

Sent from my LGLS740 using Tapatalk

calj737 · « **Reply #372 on:** June 17, 2015, 07:56:46 PM »

doesn't look too comfortable. and what sort of range will you get just running on fuel in the carb bowls?

Ravie · « **Reply #373 on:** June 17, 2015, 08:04:17 PM »

Better?

I have bottle I fashioned for the tank to get it running. My buddy who has had my tank for months was finally going to do it then his compressor (a huge one) fell over in his shop and lots of bad things happened... he told me today he's gonna get on it this week.

Sent from my LGLS740 using Tapatalk

evanphi · « **Reply #374 on:** June 18, 2015, 08:19:49 AM »

Kick it with key off, plugs out, and the air-box side tappet covers off, so you can see oil getting to the valves.

News:

Author Topic: 1975 CB750 Build! "Kona" - Sold and gone. (Read 70354 times)