Author Topic: CB500 cafe build- rust to ride  (Read 12785 times)

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Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #50 on: November 03, 2014, 11:09:33 AM »
I painted the frame with semi-gloss Rustoleum and it came out looking like factory, although I can't find the pictures of it. Ilet the coating cure for a week before attempting any work. Then I got the motor into the frame. I didn't have an assistant and really didn't want to scratch the paint on the frame, so I laid the motor on it's side and carefully lowered the frame over it. I used a come-along strap to be my third hand and aligned the frame and motor. I got the hanger bolts in then repositioned the come-along. Lifted it up and onto a block to hold it upright. Boom- no scratches.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline SOHC4 Cafe Racer Fan

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Re: CB500 cafe build- rust to ride
« Reply #51 on: November 03, 2014, 12:06:33 PM »
Nice job!! Be thankful it was not as hefty as the 750 motor.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #52 on: November 03, 2014, 01:07:26 PM »
Nice job!! Be thankful it was not as hefty as the 750 motor.

Yes. But it didn't go quite as smooth as I let on. When getting the motor off it's table, I thought I had secured the rope pretty good around it, but the motor flipped and nearly landed on my foot. No damage though. I live in the woods with no phone service- it could have been bad!
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline SOHC4 Cafe Racer Fan

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Re: CB500 cafe build- rust to ride
« Reply #53 on: November 03, 2014, 05:54:14 PM »
You would have changed your handle to "Clubfoot"!
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline rtbmrgl

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Re: CB500 cafe build- rust to ride
« Reply #54 on: December 08, 2014, 02:05:24 PM »
You would have changed your handle to "Clubfoot"!
Haha what a clown.  ;D

tennesseebreeze glad didn't get injured

thanks, Mark
Roseville, Ca

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1973 CB500 back yard find 1243 orig mi,  http://forums.sohc4.net/index.php?topic=124285.0
1976 CB750 Restoring,        http://forums.sohc4.net/index.php?topic=132997

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #55 on: December 15, 2014, 07:50:25 AM »
It's been a while. My camera was being serviced so I haven't gotten as detailed pictures of my progress over the past couple months as I'd liked to. But here are some updates to my build. After getting the motor into the newly painted frame, things have been coming along at a good clip. I got an o-ring kit for the oil pump finally. All the o-rings for this bike were a piecemeal pursuit that was pretty frustrating. The oil pump o-rings came from seller "lonelystar" on Ebay. For most of the others I got a 500 piece metric set from Ebay for under 20 dollars. That covered me for stuff like the petcock and tappet covers and other little things. Finding anything metric, such as the dozens of rusty or stripped machine bolts and screws, is virtually impossible to find locally here, and has slowed my progress.

Once I had the bike upright I was able to tackle the electrical. I bought a wiring harness for the 500 from a member here which was in good shape, but the connectors for my electrical panel were of a different type- must have been a different year of manufacture. The panel had the 6.3mm tab type of terminals while the harness had the post type. I looked everywhere for the flat terminals these bikes used and could only find them for order from china with a month long wait to be shipped. Being the impatient soul I am, I removed the terminals from the original harness I had (which was cut to bits by PO) and soldered them to the new harness' wires. I also tested the rectifier and regulator and they seem viable.

I fitted the seat, electrical panel, battery box and the filter box. My carbs are complete and ready to go in. I'm going to make the vintage carb boots I have more pliable by boiling them with wintergreen oil before I do though. I also received bars, grips and mirrors so I can start on hooking the controls up (wires also cut by the PO). I'm going to run those wires through the cafe bars to hide them.

I think the next step will be to rebuild the front disc brake. There is little room for, because of the cafe bars, for the bolt to come out of the master cylinder. It looks like I may need a 45 degree banjo bolt. I'd like to use braided steel lines if possible. If anyone has a source for this stuff let me know. I want all the braking power I can get out of this old system. People around here refuse to use turn signals. Part of the lazy, friendly, take-life-as-it-comes attitude that comes with living in the south I guess.  ???

Anyway, here are some images:
« Last Edit: December 15, 2014, 10:03:26 AM by tennesseebreeze »
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #56 on: December 15, 2014, 07:53:47 AM »
Electrical work.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #57 on: December 15, 2014, 08:00:18 AM »
I had previously recieved some parts from a member here that on closer inspection were mostly useless. I bought some rear shocks that looked shiny and new, but were actually leaking, with the springs adjusted to their tightest point, which told me they were probably no good. So I took another look at the ones that had come on my bike. They were awfully rusty, but they looked like they were viable. To tell the truth, I never really liked the look of these original shocks. With the chrome can over them they look like a chicken leg, so my solution was to cut the can off my shocks (that was the rustiest part) and clean up the rest of it with a wire tool. Looks pretty good I think. More like a racer. My concern is the pitting on the springs themselves. I'll keep an eye on that.
« Last Edit: December 15, 2014, 08:55:52 AM by tennesseebreeze »
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline Valhad

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Re: CB500 cafe build- rust to ride
« Reply #58 on: December 15, 2014, 08:40:12 AM »
Nice to see an update from you, tb!  The modification to the wiring harness look nice and clean - I'd never have known you replaced the connectors if you hadn't said.

I hope that the other parts I sent ya weren't the mostly useless ones...  :-\
In the works:
1972 CB500 project

Rideable:
1972 CB500
1975 Kawasaki S3 400
1982 Kawasaki KZ250

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #59 on: December 15, 2014, 08:43:46 AM »
Nice to see an update from you, tb!  The modification to the wiring harness look nice and clean - I'd never have known you replaced the connectors if you hadn't said.

I hope that the other parts I sent ya weren't the mostly useless ones...  :-\

Not at all! I was really happy with what you sent. You couldn't have known about those terminals. It was someone else who sent some junk.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline Valhad

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Re: CB500 cafe build- rust to ride
« Reply #60 on: December 15, 2014, 08:55:27 AM »
Nice to see an update from you, tb!  The modification to the wiring harness look nice and clean - I'd never have known you replaced the connectors if you hadn't said.

I hope that the other parts I sent ya weren't the mostly useless ones...  :-\

Not at all! I was really happy with what you sent. You couldn't have known about those terminals. It was someone else who sent some junk.

Well, I'm sorry you got any junk, but I'm glad it wasn't my junk. :) 

Good luck with the front brakes - I've really enjoyed watching this bike come together.
« Last Edit: December 15, 2014, 08:58:10 AM by Valhad »
In the works:
1972 CB500 project

Rideable:
1972 CB500
1975 Kawasaki S3 400
1982 Kawasaki KZ250

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #61 on: December 15, 2014, 09:13:54 AM »
Like trying to make a silk purse out of a sow's ear.  ;D
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #62 on: December 17, 2014, 06:31:31 AM »
From behind- shows the airbox, regulator and the battery box.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #63 on: January 23, 2015, 01:09:35 PM »
Here's an update to the progress on my 500 build. As you can see it's coming along quite nicely. I installed the carbs after boiling the rubber boots in wintergreen oil and water. It really did help with the pliability. But for those whose masculinity is challenged by the aromatherapy you exude at every red light- other paths may be taken.

In order to get the carbs, boots, and airbox in the frame I found that if you have everything set in the frame before installing any of it, you'll have better luck. I went from front to back- first boots, then carbs, then the airbox boot, then the airbox. It was a cold night when I did it so I did keep the rubber flexible with a heat gun. It worked out well. I'm very pleased that I used the stock airbox and not some other aspiration system.

I strapped on the mini turn signals that I ordered- I was a little nervous that their quality wouldn't be good. I ordered them pretty cheap ($22 a pair) from a Chinese ebay vendor, but they ended up being real nice. All powder-coated metal and LED, with amber, clear, and smoke lenses to choose from. The double tail light- not so much. Cheap "chromed" plastic. It looked better after I painted it, but I'm considering looking at other options.

One problem may be the cables I got for the bike. I didn't consider how much the cafe bars would shorten the distance the cables had to span. Problem with the 500 is the unique way the clutch cable attaches to the motor case. I'm wondering if I can shorten the cable I have somehow.

Now it's on to the exhaust, which I've ordered (MAC 4 into 1), the brakes (rebuild front), and the electrical. I have a lot of wiring work still to do. I guess I'll need tires too, or else there will be some sparks.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline Bootsey

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Re: CB500 cafe build- rust to ride
« Reply #64 on: January 24, 2015, 08:49:58 PM »
Looking good, great work so far. What's the plan for the tank/ colour scheme?

Offline Riceman

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Re: CB500 cafe build- rust to ride
« Reply #65 on: January 24, 2015, 10:57:24 PM »
On those rear shocks,if you compress the springs there are two keepers just
like on valve springs.Then you can work the shock in and out to see if they
are working.That's how I found out one of mine is blown and they aren't rebuildable.

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #66 on: January 25, 2015, 09:27:48 AM »
Looking good, great work so far. What's the plan for the tank/ colour scheme?

For now, I'm leaving it as is. Gas stains, little dents, scratches- its definitely got some history. But i think it looks good rough around the edges. If i refinish it I'll probably go with the original color- dark green.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #67 on: January 26, 2015, 08:56:06 AM »
On those rear shocks,if you compress the springs there are two keepers just
like on valve springs.Then you can work the shock in and out to see if they
are working.That's how I found out one of mine is blown and they aren't rebuildable.

How do you compress the spring to get those out? C-clamp?
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #68 on: April 23, 2015, 10:53:20 AM »
Once again I'm back after a lull in my posting discipline. As you can see, I had the bike just about assembled when I decided to take it all apart again. I had been back and forth about whether to use part of the rear fender along with the cafe hoop I had made. Looking at the bike with the seat I chose, the hoop and the tail light, I decided to fabricate a hidden mud guard/fender, as well as weld on brackets for the turn signals and brake light. I also wasn't happy with the finish I painted on the frame (it didn't cure right and had inadequate layers) and decided to redo it.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #69 on: April 23, 2015, 10:58:05 AM »
I work for a sign shop, so I had some metal fabrication tools at my disposal. I did the aluminum shaping, rolling, and cutting. But I got a more skilled welder than I to weld the .080 aluminum. It takes some finesse to mig weld it without punching holes. I riveted it to the steal frame and had to adjust the shape for the swingarm.

Since adding the mud guard the seat brackets I had fabricated earlier became useless as I could no longer reach them to install the bolt. I decided to put a side mounted piano hinge and a latch so I could take advantage of the under seat storage space that I created. The last picture there shows a welded bar where the hinge will go.
« Last Edit: April 23, 2015, 11:01:24 AM by tennesseebreeze »
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #70 on: April 23, 2015, 11:07:23 AM »
As far as the frame itself, it took a minute to find an affordable sand blaster, but my patience paid off with a local guy who charged 40.00. He also turned out to be on of these backwoods savant engineers who was building his own zero-turn mower from scratch. He also had two 750 super sports in his garage. :D
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #71 on: April 23, 2015, 11:11:26 AM »
I had our painter here at the sign shop (he's called simply: Painter) do several layers of base coat/clear coat on it. The paint we use for signs is Azko Nobel paints- the same kind that metal roofs are painted with. Toxic as hell, but it's very durable and binds excellently with metal.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #72 on: April 23, 2015, 12:16:32 PM »
Working on rebuilding the front brake too and this is what I resorted to to get the brake pad and the piston out. Kill it with fire.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline tennesseebreeze

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Re: CB500 cafe build- rust to ride
« Reply #73 on: April 24, 2015, 08:13:50 AM »
Here's my solution to getting out a thoroughly stuck brake piston. There was no saving this one.
'79 CB750F, '73 CB500K2, '78 CB400A, '71 CL100

Offline Valhad

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Re: CB500 cafe build- rust to ride
« Reply #74 on: April 24, 2015, 08:57:51 AM »
Boy, when you decide to start over, you REALLY start over!  I really dig the hidden mudguard work, and it looks like you got real creative with that front caliper.  How's the bore look, now that the piston is out?  Caliper itself still useful?

Nice to see you back on the updates :)
In the works:
1972 CB500 project

Rideable:
1972 CB500
1975 Kawasaki S3 400
1982 Kawasaki KZ250