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Author Topic: yoshimura exhaust for CB750  (Read 7785 times)

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Offline david 750f

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yoshimura exhaust for CB750
« on: March 27, 2009, 04:46:55 AM »
Have searched the forums and cannot seem to find an answer.

I am going to look at a Yoshimura header that the seller "claims" is off a 1975 CB750. Does anyone know if there is a part number marked on the exhuast? I cannot take my bike to the seller as it is apart.
Thx
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1976 CB 750F

Offline Terry in Australia

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Re: yoshimura exhaust for CB750
« Reply #1 on: March 27, 2009, 05:08:48 AM »
No mate, it won't have any numbers stamped on it, I've got one hanging up in my garage and I had one on my Yoshimura Suzuki GS1000, and back then they didn't even come with the (now  easily identifiable) Yoshimura sticker. Check it very carefully for rust, Pops used very thin, lightweight mild steel exhaust tube, and so they rust out really easily. Cheers, Terry. ;D

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Offline 736cc

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Re: yoshimura exhaust for CB750
« Reply #2 on: March 27, 2009, 05:50:12 AM »
  Carpy and Yamiya sell the repop version, and maybe M3 Racing in Mnnesota. Fuhgedaboutit finding an original, unless you know an ex-racer that has pipes hanging in the rafters.
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Offline SOHC4 Cafe Racer Fan

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Re: yoshimura exhaust for CB750
« Reply #3 on: March 27, 2009, 09:24:29 AM »
Chris Redpath at MotoGP Werks can make you a repro.
http://www.motogpwerks.com/
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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 754

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Re: yoshimura exhaust for CB750
« Reply #4 on: March 27, 2009, 09:30:45 AM »
3 things to remember on 750 pipe search;

motor is inclined

K models have a flared end to fit spigot

pipes are splayed, that is the left and right pair are angled to each other, like a cb 350 or triumph pipes. (you can see it in Terrys pic)
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Offline SOHC4 Cafe Racer Fan

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Re: yoshimura exhaust for CB750
« Reply #5 on: March 27, 2009, 09:55:06 AM »
754 brings good points about specifications.  (Thanks again, 754, for the replacement wiring harness)

The reason I recommend Chris is that he was a R&D engineer for Yoshimura (along with loads of MotoGP, Superbike, etc. race tech experience).  He designed Carpy's latest repro exhaust, based on the original.  He just made me mine for my K7 -- I'm getting a look at it today (just got ceramic coated). 
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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 bgfootball67

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Re: yoshimura exhaust for CB750
« Reply #6 on: March 27, 2009, 05:15:36 PM »
Cafe Racer Fan, please post pics and what did she run you?
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Offline seaweb11

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Re: yoshimura exhaust for CB750
« Reply #7 on: March 27, 2009, 06:00:58 PM »
Not sure if this photo is appropriate since you are looking at an original,
but this is the Yamiya product as indicated earlier in the tread.

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Offline david 750f

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Re: yoshimura exhaust for CB750
« Reply #8 on: March 27, 2009, 08:51:15 PM »
Thx for all the tips, let you know how my "barn find" goes. He also has a Yosh camshaft.
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1976 CB 750F

Offline SOHC4 Cafe Racer Fan

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Re: yoshimura exhaust for CB750
« Reply #9 on: March 27, 2009, 09:07:42 PM »
bgfootball67,

PM Sent
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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 cbr-eric

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Re: yoshimura exhaust for CB750
« Reply #10 on: April 22, 2009, 06:00:38 PM »
any updates?
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k8 project, a long way from done.....
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