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Author Topic: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"  (Read 184596 times)

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Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #925 on: April 12, 2017, 02:33:48 PM »
I was planning on the 126-20.. I will check the pistons when I get home and see if they are cut yet
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Offline Medyo Bastos

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #926 on: April 12, 2017, 04:41:25 PM »
Got 2 ring compressors if you want to add to your collection of tools


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Offline calj737

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #927 on: April 12, 2017, 04:46:43 PM »
They are not cut from Wiseco. You'll need to do the old "machinist clay" clearancing trick.

I installed the jugs on the block and measured the piston-to-deck height (mine were sitting down 0.032 in the cylinder. I then milled the deck to bring them to a near 0.00 allowing for the base gasket to create 0.01. Then, popped on the hearth clay on top of the pistons, no gasket between. Snugged it up, dropped in the cam, rotated everything, removed everything, then measured.

In the end, I seem to recall I had to mill a pocket at about a 23* angle (honestly, it's been so damn long I don't recall exact numbers.) That pocket allowed the intake clearanceuring the cams duration. Else, it would have been holes in slugs pronto.

I don't believe the 126-00 has this issue because the duration is not as long and the lift is lower too. Moral: you've got some tedious but critical work coming at you.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #928 on: April 12, 2017, 04:54:57 PM »
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
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Offline calj737

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #929 on: April 12, 2017, 04:56:49 PM »
"It never rains in California...
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #930 on: April 12, 2017, 04:57:56 PM »
You are on my roof with the hose turned on. 
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
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Offline calj737

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #931 on: April 12, 2017, 05:01:21 PM »
Shame I'm not raining down help instead of obstacles  :-[ Secretly, I want to finish my sons bike before you do yours. I'll use any trick necessary  ;D
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #932 on: April 12, 2017, 05:05:55 PM »
You just want to finish at the same time so you can eat my lunch in the BOTM voting! you bastard!  :P
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline Camrector

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #933 on: April 12, 2017, 08:25:41 PM »
Quote from: BLAC on April 12, 2017, 04:54:57 PM


Feel the same way when Cal responds on my post too!  ;D ;D
Unfortunately he is almost always correct. You will have to mill those pistons or use a different cam. I have a new 126-00 that I could put in the mail tomorrow for you if you decide to go that route.
I used different pistons to avoid having to mill and get a point or two  more compression to run the 126-20
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Online flatlander

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #934 on: April 14, 2017, 11:45:18 PM »
just confirming what you know already: 126-00 doesn't give such trouble. but i'd measure anyway with clay, to be safe.
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Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #935 on: April 15, 2017, 01:04:40 AM »
Ya I hear ya, but part of me wants to just go for it with the larger -26... we'll see..

So tragity struck. I'm reassembling my transmission and realize on of my case pins (that is at the ends of the transmission shafts) is missing  >:(

Here is a photo I took during the disassembly.  I still have the one closest to the camera, the other one is gonzo. 

Do you know if these are both the same part number? If so I will just make another one out of a drill bit in the morning..

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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline bwaller

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #936 on: April 15, 2017, 04:14:18 AM »
Same same, as well the locating pin for the shift fork on the drum.
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Offline SOHC4 Cafe Racer Fan

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #937 on: April 15, 2017, 06:42:55 AM »
Bummer. It must have escaped custody from your CSI bag and tag.
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Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #938 on: April 15, 2017, 11:23:50 AM »
I think I left it in there on accident when I mailed it out to be cleaned. It might have jumped out during shipment... alas, I will sacrifice a drill bit for the cause :)
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #939 on: April 15, 2017, 11:50:52 AM »
Every bearing is measuring .0015 so I'll be reusing them


Lubed with some redline:


So fresh, so clean  8)


Stopping point last night due to the runaway dowel


« Last Edit: April 15, 2017, 11:59:36 AM by BLAC »
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #940 on: April 16, 2017, 02:48:09 AM »
So getting this put back together was a tricky little pain in the ass until I figured out how to do it  ::)



Rebuild the caliper with Geoffrey's piston and installed it.  I actually put the caliper in a mill and flattened the face. A previous owner hammered on it to get the piston out so I smoothed it out so it will look nice once it's powder coated. Oh I used the DOW vacuum grease on the backs of both pads.


Rods installed, torqued to 18.8lbs
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline calj737

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #941 on: April 16, 2017, 04:32:41 AM »
You want to resurface that brake disc. Send it Tom at Truedisk and have him Blanchard grind it.

Also, you might want to apply a decent layer of assembly lube on those "hard parts" to insure they're slick and protected when turning them, and for first start. It's just insurance against galling and reduces friction as you go.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline MRieck

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #942 on: April 16, 2017, 06:22:07 AM »
Quote from: calj737 on April 16, 2017, 04:32:41 AM
You want to resurface that brake disc. Send it Tom at Truedisk and have him Blanchard grind it.

Also, you might want to apply a decent layer of assembly lube on those "hard parts" to insure they're slick and protected when turning them, and for first start. It's just insurance against galling and reduces friction as you go.
I agree with that.
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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #943 on: April 16, 2017, 07:11:25 AM »
Quote from: calj737 on April 16, 2017, 04:32:41 AM
You want to resurface that brake disc. Send it Tom at Truedisk and have him Blanchard grind it.


 I can also provide Rotor service for that and at nearly half the weight... http://www.vinmoto.org/gallery/v/VinMoto-Garage/album03/Godfferys-Garage-123/Parts+and+service/
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Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #944 on: April 16, 2017, 12:43:11 PM »
Quote from: calj737 on April 16, 2017, 04:32:41 AM
You want to resurface that brake disc. Send it Tom at Truedisk and have him Blanchard grind it.

Also, you might want to apply a decent layer of assembly lube on those "hard parts" to insure they're slick and protected when turning them, and for first start. It's just insurance against galling and reduces friction as you go.

Yep, the rotor is a little nasty and I was planning on a Blanchard grind. 

I have a pretty good amount of Redline assembly lube  on all of the bearings and all of the shafts where two pieces meet.  She is pretty slicked up when you try to move or rotate anything.  The only parts that don't have assembly lube on them are the actually gears, rods (excluding the ends) and the crank weights.  Should I be more liberal with it and just get a little bit on everything?
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #945 on: April 16, 2017, 12:44:52 PM »
Quote from: MRieck on April 16, 2017, 06:22:07 AM
Quote from: calj737 on April 16, 2017, 04:32:41 AM
You want to resurface that brake disc. Send it Tom at Truedisk and have him Blanchard grind it.

Also, you might want to apply a decent layer of assembly lube on those "hard parts" to insure they're slick and protected when turning them, and for first start. It's just insurance against galling and reduces friction as you go.
I agree with that.

Do you put assembly lube on the primary chain, and the transmission gears?
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline Medyo Bastos

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1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #946 on: April 16, 2017, 12:49:53 PM »
I would soak chains in oil overnight before assembly


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« Last Edit: April 16, 2017, 12:51:28 PM by Medyo Bastos »
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Offline calj737

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #947 on: April 16, 2017, 12:54:12 PM »
I wet everything during an initial assembly. Gear teeth get brushed, surfaces, lobes, etc. You name it; if it's steel it gets lubed because oil is not present until you pump it up and it takes several seconds to literally get everything wet the first time.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #948 on: April 16, 2017, 01:39:31 PM »
Quote from: calj737 on April 16, 2017, 12:54:12 PM
I wet everything during an initial assembly. Gear teeth get brushed, surfaces, lobes, etc. You name it; if it's steel it gets lubed because oil is not present until you pump it up and it takes several seconds to literally get everything wet the first time.

Sounds good, I'll give everything a good lube!

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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline riverfever

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #949 on: April 16, 2017, 04:54:39 PM »
Pretty exciting! Everything looks so clean.
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