Author Topic: 1972 "CB525" Backyard Rescue (Read 25916 times)

wowbagger · « **Reply #100 on:** April 01, 2016, 06:40:55 AM »

Thanks Steve-O. It's not my equipment. I just happen to have a very generous friend that owns a bike shop and lets me have free reign of his gear.

Also, thanks for identifying the caliper. That was exactly what I needed:
http://www.cmsnl.com/honda-cb750-four-k4-1974-usa_model482/bleeder_45109300003/

Also, in case anyone was concerned, those yellow rims in the background are not for this bike. Those are going on a friend's Kenny Roberts inspired XS1100. Here's a shot of them all done.

wowbagger · « **Reply #101 on:** April 02, 2016, 08:20:25 AM »

Finally finished the rear wheel:

It appears that Honda wants $14~ each for those bleeder screws. After a bit of digging, I found that they are 35mm M10x1.25. Turns out that O'Reiley's Auto Parts sells a two pack for $2.20. They fit just as well as the OE ones.

For the record, they are BrakeBest part #H9421-2

And one more off topic photo. This showed up at the bike shop to get modified and powder coated red today. It is destined to be the new bar tap at a local establishment:

wowbagger · « **Reply #102 on:** April 04, 2016, 06:28:50 AM »

Today's project will be to:
- Lap valves and reassemble the head
- Cut down my 110 chain to the stock 98 link length
- Powder even more parts. I still have the bars, headlight bezel, tappet covers and Honda badge side covers to do.

wowbagger · « **Reply #103 on:** April 05, 2016, 07:25:54 PM »

Well, I've just about finished the powder coating for this bike. The new, larger master cylinder showed up and I've got it back to a roller again. All in all a fair bit of progress. I did get the head torqued on just to realize that I installed the cam chain guide 180 out with the chain on the wrong side of it. So.....it's another night of walking away before I break something. I'll fix that tomorrow.

I still have these nasty things to tear apart:

SOHC4 Cafe Racer Fan · « **Reply #104 on:** April 05, 2016, 08:13:38 PM »

I'm digging that satin black PC.

wowbagger · « **Reply #105 on:** April 07, 2016, 06:41:24 AM »

It was a late night for me but the engine is complete........well, minus the tappet covers. I had to pull the rear wheel again because I realized that, in my haste to get it trued and mounted, I forgot to balance it. I'll get that back on tonight and then it's on to the dual disks and fun with carburetors.

wowbagger · « **Reply #106 on:** April 14, 2016, 06:45:30 AM »

Time to upgrade the brakes on this thing. Step one was to obtain a second speedo gear box retainer. In case things went south, I wanted to still have something to revert to.

Step two - cut off the tabs:

Then, stick it in your lathe...or find some other way to cut off the collar. The stock retainer is just over 63mm OD. We need to cut it down flat on the backside and then turn it down to just under 60mm OD so it fits inside the rotor.

Here's what it looks like when it's done compared to the original:

Time for a test fit. I had to file off that slight ridge around the edge but then it sat flush with the rotor, as it should:

The last thing to do is to get it so it spins with the hub. There are two types of CB500/550 front hubs. The older style had flats machined into the speedo side of the hub. The later style did and were just round.

My hub had the flats in it. So, I opted for a couple balls of weld to hold it in place. At the widest point on the arc it measures 4mm wide and 4mm deep. bit of welding and filing letf me with this:

The rest was just assembly. Given that the right-hand rotor is reversed and the brake union on the fork is offset to the left, I went with a 10" over lower brake hose rather than the stock length (mostly because it was less expensive). A stock length would probably work as well but would need a retainer hook to hold it like the other side:

Godffery · « **Reply #107 on:** April 14, 2016, 09:15:26 AM »

You can also secure them firmly with role pins / Spring Pins.
http://www.vinmoto.org/gallery/v/VinMoto-Garage/album03/Godfferys-Garage-123/Parts+and+service/Complete+Twin+Disc+kit/DSCN0280.JPG.html

JMS28411 I'm no Spring Chicken · « **Reply #108 on:** April 14, 2016, 09:25:03 AM »

Quote from: wowbagger on November 09, 2015, 08:27:15 AM

Since I've mentioned it a couple of time, here's a shot of my last(first) build. It's a 1971 CB500 that I got in trade for an iPad. I never got myself organized enough to do a build thread on it while I was working on it. I'm trying to be better about that with this build. We'll see how it goes.

Very Nice, I like the seat. Did you make it or buy it?

wowbagger · « **Reply #109 on:** April 14, 2016, 04:03:43 PM »

That seat came from one of the eBay stores from Thailand. I was a bit skeptical about ordering it but it's actually pretty good quality. I'll have to look up the seller's name.

Jeffro93 · « **Reply #110 on:** April 24, 2016, 04:38:38 AM »

Wowbagger - I was just looking at your lacing and trusting write-up. What torque setting did you use for the spokes. I haven't been able to find a spec that I trust. Thx

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wowbagger · « **Reply #111 on:** April 24, 2016, 04:45:26 AM »

I wasn't able to find a measurement either. I finally gave up and bought a spoke torque wrench. It came preloaded to the torque setting.

OTC 4747 22-Piece Spoke Torque Wrench Set https://www.amazon.com/dp/B0091DJTH2/ref=cm_sw_r_cp_awd_rflhxbVM3BFPC

Jeffro93 · « **Reply #112 on:** April 24, 2016, 04:50:00 AM »

Interesting. I've never seen a torque wrench with a static setting. I bought one, too, but it's adjustable.

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wowbagger · « **Reply #113 on:** April 24, 2016, 05:00:06 AM »

Markb listed the specs for a CB750 out of the Clymers here:

http://forums.sohc4.net/index.php?topic=46857.0

It lists a torque of 1.9-2.2 ft.-lb. for the front and 1.5-1.9 ft.-lb.for the rear. I would imagine this is the same measurement across bikes since the spoke wheels were mostly the same.

Jeffro93 · « **Reply #114 on:** April 24, 2016, 06:04:35 AM »

Thx!

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wowbagger · « **Reply #115 on:** May 07, 2016, 05:15:40 AM »

The build has been slow recently since I've been tied up with other projects. The fire hydrant is now successfully in use as a tap now. So, I can finally get back to my bike.

wowbagger · « **Reply #116 on:** May 07, 2016, 05:27:06 AM »

I've started tearing into my carbs and gauges. The carbs were in pretty rough shape. Not only were they full of dirt and fossilized gas but the PO thought that Honda bonding the caps and bowls on was a good idea. I only managed to get one before shot, unfortunately.

After sonic cleaning, a bit of soda blasting and a lot of time, they now look like this

The gauge disassembly did not go as well as I hoped. The speedo came apart easily enough. I did find that the best tool to use for prying open the gauge crimp ring was a $0.49 paint can opener. It made the task go quickly with minimal hand cramping and swearing

However, the needle on the tach did not pop off as intended. That little metal bit on the bottom of the needle was supposed to stay attached to the tach. Now I get to hunt around for another tach.

On the plus side of things, I did discover the 40 year old fingerprint of the person that assembled my tach dried into the paint on the outside of the inner bezel. I've found a lot of mistakes from previous owners on this bike but this was the first mistake I found from the factory.

2strokeTrush · « **Reply #117 on:** May 10, 2016, 07:35:21 PM »

Good work, keep it up man!

wowbagger · « **Reply #118 on:** May 13, 2016, 08:32:42 AM »

I made a bit more progress on the carbs and some on the gauges as well. The gauges are all torn down. I found a spare tach i can use that the needle came off without breaking. I took the opportunity to repaint the needles while they were apart. The sharpie paint pens worked pretty well for this task. Now, I'm just waiting for new gauge faces.

As for the carbs, everything is powdered and I bought new hardware and rebuild kits for them. The only thing I'm waiting on is finding felt to make new washers for the throttle shaft and choke arms. I'm going to take a run by a local tack shop at lunch and see if they have any cutoffs from saddle making that might work. Otherwise, I'll hit the fabric store and peruse.

b52bombardier1 · « **Reply #119 on:** May 13, 2016, 12:17:06 PM »

I noticed from one of your early pictures in this build that the bike came with a sissy bar. Are you going to reinstall it?

The 72 CB500 that is my next resurrection from the dead has an even taller sissy bar. I have been advised for safety reasons to remove it. The feeling is that it keeps you tethered to the bike in a lay down crash when you really might want to put some distance between you and the bike.

Your thoughts?

Rick

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wowbagger · « **Reply #120 on:** May 13, 2016, 12:51:57 PM »

Yeah, I've never been one for sissy bars. I swapped it out for the stock grab bar.

Whether or not a sissy bar might pin you to the bike I think depends entirely on the nature of the crash. I removed my purely for aesthetics.

wowbagger · « **Reply #121 on:** May 18, 2016, 05:53:50 PM »

Well, I did find some felt at a local fabric shop but cutting it down to size proved to be pretty much impossible. I ended up finding some EVA foam washers that I was able to cut down and make work. I submerged one in gas for 7 days first to make sure that it would hold up and it seems to be just fine. So, my carb rack is finally rebuilt, reassembled, bench synced and tested for leaks.

EDIT: Yes, I know that carb #3 has the wrong bowl but it's what came on it and it doesn't leak (and I didn't notice until after I powdered them all. So, I decided to just keep it.

In an effort to make this build take even longer, I am moving and have to pack it all up. The good news is my new house has an actual garage. So, I'll be able to finish this above grade. Here's hoping nothing important gets lost in the shuffle. To reduce the chance of that happening, I went ahead and bolted on anything that I could toss on quickly.

wowbagger · « **Reply #122 on:** October 11, 2016, 09:16:19 AM »

OK, judging by the big, red warning box above me, it's been a bit since I've updated this build thread. In my defense, I did say I was moving. Turns out moving across the street is just as much work as moving just about anywhere else. The new place is in disarray and the garage door on my "brand new" garage doesn't work. Now I have house PO complaints to go with my bike PO complaints. Apparently, the PO thought he'd be helpful and replace the extension springs the day before closing. Well, he forgot to pin the door up...it fell....and not it doesn't open. Repairs have ensued.

In an effort to keep my sanity, I moved the CB to my friend's shop and have been tinkering on it over there when I have time. So, far I got the main harness in, repaired the hacked wiring around the main fuse and started the headlight and tail connections. I still need to find/make a fuse block and a dash wiring harness. I'm also hunting for a new clutch cable.

More progress to come.....eventually.

Stev-o · « **Reply #123 on:** October 11, 2016, 07:07:34 PM »

Wow....your back. Congrats on the house ...

wowbagger · « **Reply #124 on:** October 12, 2016, 04:04:17 AM »

Thanks, man. It proved to be a bit more of a "fixer upper" than I anticipated but after completely gutting and rebuilding the bathroom and tearing off the front steps and rebuilding them, it's finally slowed down enough to let me turn a wrench or two.

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Author Topic: 1972 "CB525" Backyard Rescue (Read 25916 times)