Author Topic: 1973 CB750 Custom Build on Hack A Week (Read 103832 times)

mystic_1 · « **Reply #175 on:** January 24, 2016, 01:11:31 PM »

Ah, that smile when it first fires up after months of labor. Nothing quite like it.

You will be on the road soon!

I may have missed if you said this already but are you planning on any electrical system upgrades or just putting it all to stock at first?

cheers
mystic_1

disco · « **Reply #176 on:** January 24, 2016, 01:37:57 PM »

Hi Dino,

Greetings from Australia! Been watching your video series. Great to see the CB750 fire up. I was especially interested to hear the Delkevic exhaust as I also recently purchased one for my CB750 project bike.

I did notice around the 2:12 mark that you have some rust holes which have perforated the frame brackets near the rear engine mounts. You might want to check that out a bit further before taking it onto the road.

btw you've got an early model head there.

mystic_1 · « **Reply #177 on:** January 24, 2016, 02:50:01 PM »

Oh hey good catch disco!

I went back to episode 1 and they seem to be visible right at the 10:20 to 10:30 marks there too.

Dino, tap those areas with a hammer lightly to see if the metal is sounds. It looks to me like the holes were painted over. I'd at least throw some silicon or something over those before riding it to avoid ingesting any water there, that'll rot out the frame lower tubes eventually.

mystic_1

Dino · « **Reply #178 on:** January 24, 2016, 06:29:32 PM »

Thanks guys. I have noticed those holes before. The frame is powder coated. I'll plug those up with some urethane windshield sealant. Tougher than silicone and it doesn't promote rust like silicone does. The acetic acid in silicone is the culprit. I learned that from a guy that installs windshields.

The bike is a 1973 so yes, the head has the early exhaust flanges.

evanphi · « **Reply #179 on:** January 25, 2016, 07:11:16 AM »

Congrats, Dino!

Your videos were an AMAZING help last year when I did my head gasket, and will be again this year when I do my forks.

Congrats on the startup!

Dino · « **Reply #180 on:** January 25, 2016, 03:11:02 PM »

Quote from: evanphi on January 25, 2016, 07:11:16 AM

Congrats, Dino!

Your videos were an AMAZING help last year when I did my head gasket, and will be again this year when I do my forks.

Congrats on the startup!

Thanks! Just be sure to pay attention to which way that fork seals go in. The notch goes down! I made a mistake in the video and added an annotation to correct it. I still need to pull my seals out and flip them over.

MCRider · « **Reply #181 on:** January 25, 2016, 03:17:55 PM »

Quote from: Dino on January 25, 2016, 03:11:02 PM

Quote from: evanphi on January 25, 2016, 07:11:16 AM
Congrats, Dino!

Your videos were an AMAZING help last year when I did my head gasket, and will be again this year when I do my forks.

Congrats on the startup!

Thanks! Just be sure to pay attention to which way that fork seals go in. The notch goes down! I made a mistake in the video and added an annotation to correct it. I still need to pull my seals out and flip them over.

Rule of thumb (with no known exceptions) The open side of seal goes towards the oil.

evanphi · « **Reply #182 on:** January 26, 2016, 05:46:08 AM »

Quote from: MCRider on January 25, 2016, 03:17:55 PM

Quote from: Dino on January 25, 2016, 03:11:02 PM
Quote from: evanphi on January 25, 2016, 07:11:16 AM
Congrats, Dino!

Your videos were an AMAZING help last year when I did my head gasket, and will be again this year when I do my forks.

Congrats on the startup!

Thanks! Just be sure to pay attention to which way that fork seals go in. The notch goes down! I made a mistake in the video and added an annotation to correct it. I still need to pull my seals out and flip them over.
Rule of thumb (with no known exceptions) The open side of seal goes towards the oil.

Good to know. Adding this to my "notes" for the project!

strynboen · « **Reply #183 on:** January 26, 2016, 06:11:41 AM »

the sealings have dubbel lips..so think they can Work both vays..but still right is right..and vrong is vrong...even it vorks...as two tire oftes said...

Jerry Rxman Griffin aka MuthaF'er · « **Reply #184 on:** January 26, 2016, 10:25:04 AM »

If they don't leak then they are not installed improperly

Yozzer74 · « **Reply #185 on:** February 01, 2016, 12:38:52 PM »

Hi dino congratulations on getting bike running your videos have been a great help to me especially when rebuilding my top end .Just like to say thanks for taking the time to do them .

Dino · « **Reply #186 on:** February 07, 2016, 04:26:09 AM »

I got a good start on the electrical system this weekend. Any suggestions on proper routing of the harness are appreciated. Also, does anyone have info on those other rectifiers that I have in the spare parts box? I'm assuming that they are an upgrade to the stock part and would offer a little more current flow.

mystic_1 · « **Reply #187 on:** February 07, 2016, 04:51:25 AM »

This should help

mystic_1

pipeguy · « **Reply #188 on:** February 07, 2016, 05:11:35 AM »

Dino I just used your shifter assembly video it was awesome! And congrtas on first start up!

Restoration Fan · « **Reply #189 on:** February 07, 2016, 05:17:07 AM »

Just watched the video earlier. Nice job yet again, Dino!

Ron

grepper · « **Reply #190 on:** February 07, 2016, 06:06:14 AM »

Good stuff, went through this process two years ago. A lot of my stock electrical bits were in rough shape and I went as far as disassembling the plugs, soaking the terminals in vinegar, cleaning, reassemble with a dab of dialectic grease before plugging together. Not sure what after market harness your using, but I have found them to be a bit generic. You might have extra wires in the headlight bucket that don't go to anything. I struggled with it for quite some time before I read about it here.

Dino · « **Reply #191 on:** February 07, 2016, 06:49:02 AM »

Thanks for the help guys! That diagram is perfect mystic_1!

SOHC4 Cafe Racer Fan · « **Reply #192 on:** February 07, 2016, 06:51:23 AM »

Quote from: Dino on February 07, 2016, 04:26:09 AM

I got a good start on the electrical system this weekend. Any suggestions on proper routing of the harness are appreciated. Also, does anyone have info on those other rectifiers that I have in the spare parts box? I'm assuming that they are an upgrade to the stock part and would offer a little more current flow.

Dino,

Is the other rectifier is likely a solid-state regulator rectifier unit? If so, it's a solid improvement over the stock parts.

Jerry Rxman Griffin aka MuthaF'er · « **Reply #193 on:** February 07, 2016, 08:56:39 AM »

How many wires and what color come from your extra electronics?

chewbacca5000 · « **Reply #194 on:** February 15, 2016, 07:04:15 PM »

You would think the solid state regulator would be an improvement, but that is not necessarily true. The original unit has a points gap that allows you to fine tune the voltage output. The stock electrics are fine for most applications. If use a led headlight you will be in the energy surplus. Too bad you can't sell it back to the grid. Ha,ha,ha

Dino · « **Reply #195 on:** March 05, 2016, 07:45:52 AM »

OK quick question. I'm working on the final phases of installing the wiring on the CB750K3 today. Since I didn't take the bike apart, I'm having to source pictures to determine where the wires route on the bike. I have most of it sorted out but I'm curious if anyone knows what the proper routing is for the ignition wire loom that come from the points? Does it go under or over the engine? I know where it joins to the main harness.

Any advice is most appreciated.

Ravie · « **Reply #196 on:** March 05, 2016, 07:59:53 AM »

Well, under, sort of. There should be a bendy clip held on by the corner screw on the bottom/rear of the case (very near where that wire comes out of the hole by the points) and then it goes along that side/bottom area and above the oil line hookups on the case. It then turns in behind the oil tank and connects.

Artfrombama · « **Reply #197 on:** March 05, 2016, 08:43:52 AM »

Quote from: Ravie on March 05, 2016, 07:59:53 AM

Well, under, sort of. There should be a bendy clip held on by the corner screw on the bottom/rear of the case (very near where that wire comes out of the hole by the points) and then it goes along that side/bottom area and above the oil line hookups on the case. It then turns in behind the oil tank and connects.

\

Awesome videos on your CB750 and Sabre V45 bikes.

Dino · « **Reply #198 on:** March 05, 2016, 09:01:44 AM »

Thanks guys!

You just got a shout out on this week's video.

mystic_1 · « **Reply #199 on:** March 05, 2016, 10:16:47 AM »

This may help.

mystic_1

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Author Topic: 1973 CB750 Custom Build on Hack A Week (Read 103832 times)