Author Topic: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"  (Read 189240 times)

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Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #875 on: April 27, 2017, 06:06:17 PM »
Yep, I'm going to outsource that.  No reliefs have been cut (beyond factory) on these pistons
« Last Edit: April 28, 2017, 11:17:43 AM by BLAC »
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 NobleHops

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #876 on: April 29, 2017, 03:24:44 PM »
I'm pretty sure I've mentioned it before, just make sure those valve reliefs are big enough for the 126-20. They don't appear to be now.

How is that done Cam?
« Last Edit: April 29, 2017, 06:53:45 PM by NobleHops »
Nils Menten * Tucson, Arizona, USA

I have a motorcycle problem.

My build thread: NobleHops makes a 400F pretty for his wife: http://forums.sohc4.net/index.php?topic=131210.0

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #877 on: May 03, 2017, 06:13:44 PM »
Just got some 520 chain conversion sprockets ordered from Sprocket Specialists

Im thinking this chain is too pretty not to buy  :P  Anyone have experience with the lightweight '3D' 520GP chain from EK?

« Last Edit: May 04, 2017, 05:14:23 PM by BLAC »
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 RAFster122s

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #878 on: May 04, 2017, 04:33:07 PM »
EK makes good chains, no experience with the 520GP.
David
David- back in the desert SW!

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #879 on: May 04, 2017, 04:34:11 PM »
EK makes good chains, no experience with the 520GP.
David

I hope it ends up being worth the cost, because I already ordered it  ;D
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 RAFster122s

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #880 on: May 04, 2017, 08:27:10 PM »
Ask bwaller, Brent, what he uses on his race bike, I think he uses the 520.  It is a almost elegant design.  What did the sprocket sets cost you?
Just curious if the 520 ends up being more expensive than  the 530 chain and sprocket set.
But, I imagine this 520GP chain costs more than a standard 520 chain would cost.

Does 4 into 1 carry EK or was it DSS I looked at pricing some things the other day.

South Sound Honda in WA state in Olympia are has good prices if ordering Genuine Honda.  Some of the CX and GL owners on that forum have reported very good prices and shipping charges have been very reasonable as well, even on small orders.  They found their discount to be either the best or close to the best and the shipping made up for it.

Worth taking a look at....

So, pack a few bologna sandwiches for work instead of going out to eat if you normally would...or skip the Starbucks or coffee shop and you will soon have saved the amount you spent extra on that chain...

Or, buy a container of chocolate whey protein and have a 20g protein shake instead of lunch and you are likely to easily shave a few pounds of weight over the course of a month or two at the most...every pound you trim off your body will be that much less on the bike, which if racing pays dividends on the track.  Easier to trim 5-10 pounds off your body than it is your bike.

Your spouse or girlfriend is likely to hate you for how easily you can drop weight...at least that will be true until you hit your 50s and higher when changes in your body start making it harder to lose weight than it " used to be"...
David- back in the desert SW!

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #881 on: May 04, 2017, 08:53:11 PM »
The sprockets (front and rear) ended up being $120 shipped to my door after I spent up to have it anodized/machine polished (around the speed hole lips).

The chain retails around $350 but I found a pretty decent price on amazon (the last one available through the EK store) and with a gift card I had laying around I think I ended up paying another $130 out of pocket... still a damn expensive chain, but there should be significant weight savings between the steel stock sprocket and chain vs this setup, additionally the nickle plating/polishing on this chain is beautiful.

I'll do a weight comparison of the two setups sode by side and see how many pounds I saved for ~$250  :o ;D
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 slikwilli420

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #882 on: May 05, 2017, 05:20:19 AM »
Plenty of nice 520 chains for well under $100. I'm using a DID520vx2 that is high tensile, x ring and cost about $70.
All you gotta do is do what you gotta do.

Vintage Speed Parts Mashup: http://forums.sohc4.net/index.php?topic=133638.0
Rickman CR Parts Kit Refresh: http://forums.sohc4.net/index.php/topic,154837.0.html
AHRMA CB750 Racer: http://forums.sohc4.net/index.php/topic,158461.0.html
AHRMA Superbike Heavyweight Racer: http://forums.sohc4.net/index.php/topic,173120.0.html
'76F CB750 Patina Redemption: http://forums.sohc4.net/index.php/topic,174871.0.html

Offline bwaller

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #883 on: May 05, 2017, 09:01:58 AM »
I looked quickly & I don't see any tensile rating for that big dollar offering!! Lower friction is a good thing. I use EK 520SR on my race bike. It's cheap and I replace every year. I also remove & clean and relube after every race. Always look for a good tensile rating, but modern 520's are more chain than we need for our piddly HP bikes.

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #884 on: May 05, 2017, 09:06:46 AM »
It's rated at 9,400lb tensile.

Understand I am under no illusion that this chain will work miracles, or that there weren't better deals out there  :P I just really liked the look and how light it was.  No reason to start half assing things now haha
« Last Edit: May 05, 2017, 11:44:19 AM by BLAC »
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 #885 on: May 05, 2017, 11:42:59 AM »
Wow that's quite a chain. Just imagine what the rating for a 530 chain back when the 750's were new! Then Honda used that giant 630 which still would have been much less than 9200. Lighter, less friction and higher tensile strength a bargain at twice the price!  ;D

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #886 on: May 05, 2017, 11:45:16 AM »
Wow that's quite a chain. Just imagine what the rating for a 530 chain back when the 750's were new! Then Honda used that giant 630 which still would have been much less than 9200. Lighter, less friction and higher tensile strength a bargain at twice the price!  ;D

Edit: 9,400 lbs tensile strength  8)

the 530 version is rated at 11,400!  :o
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 #887 on: May 08, 2017, 06:05:24 PM »
My search for rear sets has finally come to an end.  I didn't like how far out the Tarozzi levers flared out and the flat ones were basically impossible to track down, but I found these from TEC, they are inexpensive but look like they have a nice build quality.

I will update y'all once I get them bolted up, but so far so good for just over $100



« Last Edit: May 08, 2017, 06:07:37 PM by BLAC »
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 slikwilli420

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #888 on: May 08, 2017, 07:10:29 PM »
My search for rear sets has finally come to an end.  I didn't like how far out the Tarozzi levers flared out and the flat ones were basically impossible to track down, but I found these from TEC, they are inexpensive but look like they have a nice build quality.

I will update y'all once I get them bolted up, but so far so good for just over $100





That's what I bought for my race bike. They seem like really good quality.
All you gotta do is do what you gotta do.

Vintage Speed Parts Mashup: http://forums.sohc4.net/index.php?topic=133638.0
Rickman CR Parts Kit Refresh: http://forums.sohc4.net/index.php/topic,154837.0.html
AHRMA CB750 Racer: http://forums.sohc4.net/index.php/topic,158461.0.html
AHRMA Superbike Heavyweight Racer: http://forums.sohc4.net/index.php/topic,173120.0.html
'76F CB750 Patina Redemption: http://forums.sohc4.net/index.php/topic,174871.0.html

Offline Godffery

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #889 on: May 09, 2017, 06:04:28 AM »
In the Bottom row, there are 4 flat verity's to choose from:
http://www.fastfromthepast.com/rearsets/universal

Offline redwillis1978

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My search for rear sets has finally come to an end.  I didn't like how far out the Tarozzi levers flared out




They look good.

The concern is that the toe peg is well inside from the heel peg knurl. This may require you to be "pigeon-toed" to shift. You may need to space out the toe peg so you can reliably catch it during spirited driving.

Offline bwaller

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #891 on: May 09, 2017, 07:39:25 AM »
There's no law, or anything else, stopping a riders boot from being over the peg pivot! Then you could even shorten the pegs.

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #892 on: May 09, 2017, 10:00:18 AM »
In the Bottom row, there are 4 flat verity's to choose from:
http://www.fastfromthepast.com/rearsets/universal

I was refering to how hard it is to find the Tarozzi brand flat ones.  I did see these listed but at more than 2x the cost I figured I would try the ones from TEC and see how they turn out. 
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 Godffery

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #893 on: May 09, 2017, 11:18:49 AM »
In the Bottom row, there are 4 flat verity's to choose from:
http://www.fastfromthepast.com/rearsets/universal

I was refering to how hard it is to find the Tarozzi brand flat ones.  I did see these listed but at more than 2x the cost I figured I would try the ones from TEC and see how they turn out.
Woops, I missed the part where you said those other ones were only $100.  That's almost too good of a deal..?

 Just for reference, the lever Arm can be bought separately: http://www.fastfromthepast.com/99-0016-1
« Last Edit: May 09, 2017, 11:29:17 AM by Godffery »

Offline BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #894 on: May 09, 2017, 11:30:59 AM »
In the Bottom row, there are 4 flat verity's to choose from:
http://www.fastfromthepast.com/rearsets/universal

I was refering to how hard it is to find the Tarozzi brand flat ones.  I did see these listed but at more than 2x the cost I figured I would try the ones from TEC and see how they turn out.
Woops, I missed the part where you said those other ones were only $100.  That's almost too good of a deal..?

Ya, I was nervous but watched lots of youtube reviews and read lots of forum posts about them and only heard good things, so worth a shot!  They are a British company, and their priced on their euro site are even cheaper (but they don't ship to the US from there)
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 #895 on: May 12, 2017, 04:43:02 PM »
Well, today's lunch break got a little out of hand... I bought this and pick it up tonight.

« Last Edit: May 12, 2017, 05:20:24 PM by BLAC »
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 SOHC4 Cafe Racer Fan

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #896 on: May 12, 2017, 09:59:15 PM »
It's good to have spares!  ;)
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 BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #897 on: May 13, 2017, 12:31:58 AM »

It's all stock with 10k miles with the only aftermarket addition being a full Kerker system complete with original baffle


Getting acquainted with her disfigured sister  :o
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 SOHC4 Cafe Racer Fan

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #898 on: May 13, 2017, 06:07:07 AM »
For the price, not a bad bike to keep as your "vintage" until the custom is complete.  You should not lose a dime when you sell it.
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 BLAC

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Re: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"
« Reply #899 on: May 13, 2017, 10:17:31 AM »
Yep I'm going to rebuild the carbs, and put some elbow grease into it and should be able to ride it for 6 months and make $500 on it.  It was a good find.

We agreed on a price then another guy called him offering him more but the seller gave me yesterday to buy it then it was the other buyers.  So already could make money on it  :P
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