Author Topic: My 73 barn find with 15k original miles! (Read 18656 times)

calj737 · « **Reply #125 on:** February 21, 2015, 06:35:10 PM »

There's supposed to be some spacers (thick washers) in the pinch clamps. Too frequently these are lost and when you clamp down the forks, the tree cracks. You can lily get a stock replacement from Bill Benton or, buy a billet aluminum aftermarket unit. You just need to get one of these with bar clamps for your clubmans

sulphurdave · « **Reply #126 on:** February 21, 2015, 07:28:41 PM »

No there were no washers or spacers when I loosened them up to drop the forks so yea I over tightened them I guess. Never would have known. Doesn't surprise me though with this bike.

sulphurdave · « **Reply #127 on:** February 22, 2015, 04:25:05 PM »

Real quick... will a 72 CB350 triple tree fit my bike?

http://pages.ebay.com/link/?nav=item.view&alt=web&id=361219322734

krusty · « **Reply #128 on:** February 22, 2015, 05:24:32 PM »

Wont fit a 750 but its gone now. Pretty sure it would fit 350 twins and fours as well as 250 twin.

sulphurdave · « **Reply #129 on:** August 08, 2015, 04:59:49 PM »

I fixed the triple tree and I'm trying to finish up the wiring from the bar swap. I had marked everything before pulling the wires through the factory bars but I had difficulty pulling them through on the left side (sitting on the bike). I had to cut the wires losing all my markings on that side. I was able to wire up the right side and I think I got everything wired up correctly on the left side too because for the most part they are all color coded (if that's how they are wired I'm good there). However I have a white wire and a blue/white wire coming off the left side handlebars that I don't know where they go. If I can get that right I'll be back to where I was when I started. And at that point I didn't have a headlight that was wired up so I would then need to know what wires to use to wire up the headlight. My new headlight has a blue, white and a green wire.

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calj737 · « **Reply #130 on:** August 08, 2015, 05:37:40 PM »

Right handle bar: WHT is Lo beam power to headlight (WHT)
Right handlebar BLU/WHT goes to R front Turn housing
Headlight GREEN is Ground for the headlight.
Headlight BLUE is HI beam

Here's your wiring diagram to help!

http://manuals.sohc4.net/cb750k/technical_reference/WD750K3_K7.jpg

sulphurdave · « **Reply #131 on:** August 08, 2015, 06:13:53 PM »

I caught a mistake I said those leftover wires came off the right side I meant the left side which had double the amount of wires on that side.

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sulphurdave · « **Reply #132 on:** August 08, 2015, 08:40:47 PM »

Well I have low beam but no high beam can't figure out where the blue wire goes. I've tried a few places and still nothing. I also don't know where that blue/white wire off the left side handle bar goes. I don't have the actual turn signals hooked up but the dummy light don't blink when it's turned on. I did hook up a two wire signal in the rear and it didn't blink just slowly came on dim and stayed that way until I turned it off. Tried reversing wires same thing. The speedo light comes on but the tach light does not. Horn works. Dummy lights work. Low beam headlight comes on. Starter does not turn over but I think the battery is weak.

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calj737 · « **Reply #133 on:** August 09, 2015, 05:27:27 AM »

Is the BLUE you're holding, coming from the headlight or from the harness?

If you look at the wiring diagram I attached, there's a BLK, WHT and BR/RED coming from the switch housing. The BLK carries your HI beam current and also is used to power your idiot light for the HI.

Your stock Turn Signal Relay may not be functioning if your battery is weak, and that can be why you're not seeing the idiot light. It could also be wiring, but let's wait and see.

Tach and Speedo back lighting is served by BR/WHT. There should be a multi connector in there with multiple female ends that the gauge wire plugs into.

Your bike may have the Clutch Safety wiring routed through the START button, DK GRN/RED. Don't confuse this one with the NEU wiring. The START also uses YLL/RED to the solenoid.

Side note: you know I love you man, but those red plastic crimps are sh!t and gotta go! They will let you down day after day and you'll be pulling your hair out chasing electrical problems. They are not reliable nor weather proof at all. In your climate, this is really important. Go to http://vintageconnections.com and grab a kit of stock connectors and their crimping tool and replace all those. Please!

sulphurdave · « **Reply #134 on:** August 09, 2015, 06:39:17 AM »

Yea I know man it really ticked me off I had to cut all those wires and lose the factory connections. I'll do it right when I figure it all out cause I'll want it to look neater when I start making things look pretty. Those connections is just what I had at home.

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sulphurdave · « **Reply #135 on:** August 09, 2015, 11:19:42 AM »

BTW that blue wire I'm holding is from the new headlight trying to figure out where to tie it into the harness. I know it's the high beam wire I'm just lost on the instructions I guess. Just not seeing it yet.

I fixed the tach light that was my fault by thinking I could bypass the junction of brown/white wires and tie two together separate from the junction.

I charged the battery over night it's still weak but I did get the starter to turn the motor over a few times. It was weak months ago when I had it running so I would kick it over. That's back to where I was at least. Feel a little better.

So right now I THINK my only issues are the high beam and turn signals.

I'm about to put gas in that tank for the first time, hook up the fuel lines and try to kick it over and see if it runs again and go from there.

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calj737 · « **Reply #136 on:** August 09, 2015, 12:03:00 PM »

If you can, from each handle bar switch tell me what wire colors come each. We will find your HI beam wire.

The K bikes have 2 possible wiring schemes. You may have the earlier switches and harnesses, but the diagram I posted is form the later years.

sulphurdave · « **Reply #137 on:** August 09, 2015, 12:23:20 PM »

Well now I'm not worried about the wiring I have bigger issues. Call me.

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calj737 · « **Reply #138 on:** August 09, 2015, 12:48:38 PM »

Quote from: sulphurdave on August 09, 2015, 12:23:20 PM

Well now I'm not worried about the wiring I have bigger issues. Call me.

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Sent you a text-

calj737 · « **Reply #139 on:** August 10, 2015, 05:41:24 AM »

Dave - have a look at this diagram instead:
http://manuals.sohc4.net/cb750k/technical_reference/WD750K1_K5.pdf

This is the one we were using last night. Follow the BLK/WHT wire from the coils to the switch (right side, at the top of page 1). And call me after work so we can sort this out....

sulphurdave · « **Reply #140 on:** August 10, 2015, 08:40:06 AM »

I'm just hoping something is not wired correctly because I feel that black and white wire coming off the handle bar is fine. Could be wrong but those wires were easily pulled through the bars and the switch housing looks unharmed.

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sulphurdave · « **Reply #141 on:** August 20, 2015, 12:20:00 PM »

Huge thanks to calj737 for all of the hours helping wiring up this bike after the handle bar swap. A little setback on the tank but I'll get that back looking good again and finish the build.

Currently the bike is sitting like this.

https://youtu.be/hBbIF_cEhX4

calj737 · « **Reply #142 on:** August 20, 2015, 01:28:43 PM »

Dave - that sounds and looks fantastic! You did a helluva job, barefoot and all!

bikes fires instantly too, man that has to feel great

sulphurdave · « **Reply #143 on:** August 20, 2015, 02:05:22 PM »

No such thing as shoes at my house. I don't let stepping on a hot soldering iron change that either lol.

SOHC4 Cafe Racer Fan · « **Reply #144 on:** August 20, 2015, 02:15:46 PM »

Quote from: sulphurdave on August 20, 2015, 02:05:22 PM

No such thing as shoes at my house. I don't let stepping on a hot soldering iron change that either lol.

Did it smell like sulphur, sulphurdave?

sulphurdave · « **Reply #145 on:** August 20, 2015, 02:17:37 PM »

If you're referring to smelling like sulfur no not really but it did smell like burnt Dave

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sulphurdave · « **Reply #146 on:** September 28, 2015, 05:57:49 PM »

OK so I ended up with a different tank all together from the one I started with. I'll end up painting it at some point but it was too tempting to hook everything up and ride it.... for the FIRST time since I've had it almost a year ago.

https://youtu.be/Y1L033SkEmg

Restoration Fan · « **Reply #147 on:** September 28, 2015, 08:01:27 PM »

Dave,
Great job on the bike.

Please, please though put on a helmet. We've recently lost a member of this forum to an accident where he wasn't wearing a helmet; we don't want to lose another one who has the talent you have!

Ron

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Author Topic: My 73 barn find with 15k original miles! (Read 18656 times)