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Author Topic: 78 CB750K rear shocks lower "offset"  (Read 1662 times)

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Offline gmen0101

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78 CB750K rear shocks lower "offset"
« on: January 18, 2017, 10:41:49 AM »
My rear shocks are installed with an "offset" bracket for lack of a more technical term.  Looking through all the pictures of other bikes here and on the Internet, I have not seen another CB750 with these.  I attempted to attach a picture where you can see the bracket where the lower end of the shock attaches.  Can anyone shed light as to what benefit they provide?
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Offline SOHC4 Cafe Racer Fan

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Re: 78 CB750K rear shocks lower "offset"
« Reply #1 on: January 18, 2017, 12:42:45 PM »
It's very difficult to see the "offset" in the bracket attached to the lower swingarm. Perhaps you should post a photo from the rear.

Generally, it is not the best idea to put all of the stress of the suspension on a bracket that might not be as strong enough to withstand repeated stress

Looks may be deceiving, but it appears that your shocks are canted forward.  This may change the effectiveness of the shocks to dampen forces on the swingarm.
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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: 78 CB750K rear shocks lower "offset"
« Reply #2 on: January 18, 2017, 01:18:35 PM »
Lowering blocks, many used them to lower the gap between tire and fender plus the seat..
Not everyone is a pegscraper.
 I put thousands of miles on with one of those.. You can switch back to stock position , in 15-20 mi utes... Then see which you prefer..
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Offline gmen0101

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Re: 78 CB750K rear shocks lower "offset"
« Reply #3 on: January 18, 2017, 01:49:08 PM »
ROT - I think you nailed it with what these are/do.  They do move the lower end of the shock back, giving it that canted forward look, but it also lowers the seat/fender closer to the wheel.  I marked up another picture where I tried to outline the bracket.

Thanks for the quick replies and info.  I may do what you suggest about taking it out and see if I which way I prefer.
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Offline SOHC4 Cafe Racer Fan

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Re: 78 CB750K rear shocks lower "offset"
« Reply #4 on: January 18, 2017, 02:03:03 PM »
Moving them to stock will improve handling.
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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 SOHC4 Cafe Racer Fan

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Re: 78 CB750K rear shocks lower "offset"
« Reply #5 on: January 18, 2017, 02:04:35 PM »
Your term "offset" had me thinking these were offset outward of the bike, too -- not just canted forward.  No rear photo necessary.
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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 Brian750

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Re: 78 CB750K rear shocks lower "offset"
« Reply #6 on: July 07, 2018, 01:22:40 PM »
 Thanks for the info guys! I was wondering what those were for.
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