Author Topic: 1975 Supersport, performance cafe  (Read 119969 times)

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Offline SOHC4 Cafe Racer Fan

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Re: 1975 Supersport, performance cafe
« Reply #425 on: September 02, 2013, 08:25:38 PM »
Dave,

Looking good!  I am torn on the steering damper issue on this build.  Can you share what type you are installing and how you plan to mount it? 

Also, are those stock GL1000 brake discs or aftermarket?  What kind of fork brace are you going to use? 

PS  The bike looks awesome, as ever.  I was so focused on the front end, I completely missed the graffiti on the lift.  ;D
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 Doctor_D

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Re: 1975 Supersport, performance cafe
« Reply #426 on: September 03, 2013, 06:58:38 AM »
Doc,
I'm doing a GL1000 fork swap too.  Can you share where you got the phenolic pistons and EBC discs and details on the parts?

Here's what I've gotten so far:

Part                                                                                                   Supplier
Replacement Fork Seals                                                                                    Z1
Fluid   US3 (15wt)                                                                                               Racetech
Cartridge emulators & adapter FEGV S3301 & FPEV AD3303 P                        Racetech
Fork tubes   -2"                                                                                            Franks Maintenance and Engineering
Springs   FRSP S2643095                                                                                Racetech
Fork Brace (Superbrace)                                                                                   Randakks
Gators                                                                                                               EBay      
Tapered steering bearings  All Balls                                                                  EBay
Caliper rebuild   hardware                                                                                  Bike Bandit
Brake master cylinder  5/8"                                                                              Randakks
Brake lines and "T"                                                                                           Spiegler
Rotors EBC MD1074LS & MD1074RS                                                                 Bike Bandit
Brake pads  EBC Semi-sintered                                                                        Bike Bandit
Phenolic caliper pistons                                                                                    Godffrey's Garage (member here)
Top triple tree (CNC)                                                                                        Dime City Cycles

I seem to recall you asking the rotor question before. ;-)
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline Doctor_D

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Re: 1975 Supersport, performance cafe
« Reply #427 on: September 03, 2013, 07:33:08 AM »
As for the damper, we'd welded a mount to the frame originally, and I've been running a simple NHK unit that I picked up from MikesXS.

So, it's just a matter of adding a mount to the fork leg to keep the damper.  I liked the look of this SES unit: http://www.ebay.com/itm/37MM-STEERING-DAMPER-FORK-CLAMP-/280722516473?pt=UK_Motorcycle_Parts_13&hash=item415c5da9f9 and it should be here soon
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline SOHC4 Cafe Racer Fan

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Re: 1975 Supersport, performance cafe
« Reply #428 on: September 03, 2013, 09:33:25 AM »
Doc,
I'm doing a GL1000 fork swap too.  Can you share where you got the phenolic pistons and EBC discs and details on the parts?

Here's what I've gotten so far:

Part                                                                                                   Supplier
Replacement Fork Seals                                                                                    Z1
Fluid   US3 (15wt)                                                                                               Racetech
Cartridge emulators & adapter FEGV S3301 & FPEV AD3303 P                        Racetech
Fork tubes   -2"                                                                                            Franks Maintenance and Engineering
Springs   FRSP S2643095                                                                                Racetech
Fork Brace (Superbrace)                                                                                   Randakks
Gators                                                                                                               EBay      
Tapered steering bearings  All Balls                                                                  EBay
Caliper rebuild   hardware                                                                                  Bike Bandit
Brake master cylinder  5/8"                                                                              Randakks
Brake lines and "T"                                                                                           Spiegler
Rotors EBC MD1074LS & MD1074RS                                                                 Bike Bandit
Brake pads  EBC Semi-sintered                                                                        Bike Bandit
Phenolic caliper pistons                                                                                    Godffrey's Garage (member here)
Top triple tree (CNC)                                                                                        Dime City Cycles

I seem to recall you asking the rotor question before. ;-)

Hey Dave,

I'm getting old and forgetful. ;)  Last night I was looking from my iPhone and the discs looked different than stock -- looking on my PC they are clearly floating rotors.

I wasn't sure if you were still running the EBC discs or not (as they were spaced to you old 750F front end).  Since you had switched to a GL1000 front,  I assumed that the spacing to the rotors was different, so I wasn't sure if you you went to the GL1000 discs or did something new.  I see from the fitment guide that the MD1074 is a direct swap for the GL1000 rotors.  I imagine they save a few lbs from the stock rotors.

« Last Edit: September 03, 2013, 09:59:46 AM by CB750 Cafe Racer Fan »
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: 1975 Supersport, performance cafe
« Reply #429 on: September 03, 2013, 10:09:45 AM »
I, too, am in the midst of a GL1000 front swap.  I have 1.125" shorter than stock tubes (from Forking by Frank), the Dime City upper triple clamp and brackets to mount my key switch and gauges, and the stock GL1000 brake calipers (with Goddfrey's phenolic pistons) and drilled GL1000 brake discs.  I originally mounted Tarozzi high-rise clip-ons but they would not hold their position because the pivots are not indexed -- no matter how tight you ratchet them, they still move when you push or pull with a bit of force.  I swapped them out for 37mm Vortex clip-ons.  I also went with a Telefix fork brace.  I am using the Motolanna fork ears, but I have decided to invert them, because I think they will look better slanting upward than downward (as they are pictured below).  I am on the fence as to a steering damper, but I am gathering ideas in case I get any head shake down the road.  I like the idea of lighter, floating rotors, so I might upgrade down the road, as well. 



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 RAFster122s

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Re: 1975 Supersport, performance cafe
« Reply #430 on: September 06, 2013, 02:20:04 PM »
 CB750 Cafe Racer Fan, what's the "British Flag" doing on your turn indicator/indicator light panel?  These are Japanese bikes, not British bikes...
 ;D ;)
David- back in the desert SW!

Offline SOHC4 Cafe Racer Fan

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Re: 1975 Supersport, performance cafe
« Reply #431 on: September 08, 2013, 11:36:47 AM »
CB750 Cafe Racer Fan, what's the "British Flag" doing on your turn indicator/indicator light panel?  These are Japanese bikes, not British bikes...
 ;D ;)

There's a Union Jack on the oil tank, too.   It's a Japanese bike, with Brit cafe style. 
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 Doctor_D

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Re: 1975 Supersport, performance cafe
« Reply #432 on: September 19, 2013, 06:50:24 AM »
Well, I rode it to Backfire Moto last night, and what a difference.  The new brakes have transformed the bike into something much more confidence inspiring.  Before, I was hesitant to really get on the throttle because it would eat road so quickly and in the city you never knew when you'd have to stop.  The brakes weren't bad - they just weren't as good as they should be on a bike this fast.

Now, I grab a handful of brake, and drop out of warp without any drama or uncertainty.  I found myself waiting to brake late just to test the threshold braking and progressivity of the setup.  The rigidity of the forks has to help here as well.  In a little bit of winding road riding in the Magnolia neighborhood last night, the front end felt less noodley.  Again, not that the CB front end was bad, just that there is a noticeable difference here.

The only complaint is that there's a little fork stiction, which should improve as the new seals break in.
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline SOHC4 Cafe Racer Fan

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Re: 1975 Supersport, performance cafe
« Reply #433 on: September 19, 2013, 07:58:57 AM »
Well, I rode it to Backfire Moto last night, and what a difference.  The new brakes have transformed the bike into something much more confidence inspiring.  Before, I was hesitant to really get on the throttle because it would eat road so quickly and in the city you never knew when you'd have to stop.  The brakes weren't bad - they just weren't as good as they should be on a bike this fast.

Now, I grab a handful of brake, and drop out of warp without any drama or uncertainty.  I found myself waiting to brake late just to test the threshold braking and progressivity of the setup.  The rigidity of the forks has to help here as well.  In a little bit of winding road riding in the Magnolia neighborhood last night, the front end felt less noodley.  Again, not that the CB front end was bad, just that there is a noticeable difference here.

The only complaint is that there's a little fork stiction, which should improve as the new seals break in.

Dave,
Glad to hear your satisfaction with the new front end and brakes. The stock CB750 front can feel a little wobbly in comparison to a modern bike.  I am hoping to feel as happy about my GL swap when I get my bike on the road.
Love your bike and would love to see some more pictures of the newly completed version.
D
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 Doctor_D

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Re: 1975 Supersport, performance cafe
« Reply #434 on: September 22, 2013, 07:47:05 PM »
Here it is at Backfire Moto last Wednesday.



And since it's back on the road, it will commence raining in Seattle in 3... 2... 1...
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline RAFster122s

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Re: 1975 Supersport, performance cafe
« Reply #435 on: September 22, 2013, 09:22:11 PM »
David, very clean and nicely put together...

Well it is fall and around here it rains more in spring and fall, but this year has been wetter than normal with over 16 (?) inches above normal precipitation levels
David- back in the desert SW!

Offline Doctor_D

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Re: 1975 Supersport, performance cafe
« Reply #436 on: October 05, 2013, 02:01:32 PM »
Yesterday was gorgeous, as is today and possibly tomorrow.  Enjoying it while it lasts.



Have to laugh though.  The rear rotor is bigger than the front rotors.  Think I'll ditch the pie-plate and put some smallish, modern thing on there over the winter including an underslung Honda caliper.  Something interesting to research during the rainy months.

The best projects are never done, I guess.
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline bwaller

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Re: 1975 Supersport, performance cafe
« Reply #437 on: October 05, 2013, 05:25:59 PM »
Yesterday was gorgeous, as is today and possibly tomorrow.  Enjoying it while it lasts.



Have to laugh though.  The rear rotor is bigger than the front rotors.  Think I'll ditch the pie-plate and put some smallish, modern thing on there over the winter including an underslung Honda caliper.  Something interesting to research during the rainy months.

The best projects are never done, I guess.
[/b]

Never a truer word spoken David.  ;D

Offline 754

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Re: 1975 Supersport, performance cafe
« Reply #438 on: October 05, 2013, 07:02:05 PM »
16 inches of rain.. That is a whole year for us ..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Godffery

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Re: 1975 Supersport, performance cafe
« Reply #439 on: October 06, 2013, 07:46:16 AM »

Have to laugh though.  The rear rotor is bigger than the front rotors.  Think I'll ditch the pie-plate and put some smallish, modern thing on there over the winter including an underslung Honda caliper.  Something interesting to research during the rainy months.

The best projects are never done, I guess.

I can make your "Pie-plate" Much lighter if you'd like.
http://www.vinmoto.org/gallery/v/VinMoto-Garage/album03/Godfferys-Garage-123/95/Brake+Rotors+_+Thinned+and+Drilled/
Yours would be in the top row, 3rd one over. These Rotors are nearly half the weight of stock and grab like the X-wife on her way out of the house.

Offline Doctor_D

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Re: 1975 Supersport, performance cafe
« Reply #440 on: October 06, 2013, 09:09:47 AM »
16 inches of rain.. That is a whole year for us ..

You must be in the rain-shadow, across from Sequim.  We get 39" in Seattle.
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline Doctor_D

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Re: 1975 Supersport, performance cafe
« Reply #441 on: October 06, 2013, 09:32:05 AM »

Have to laugh though.  The rear rotor is bigger than the front rotors.  Think I'll ditch the pie-plate and put some smallish, modern thing on there over the winter including an underslung Honda caliper.  Something interesting to research during the rainy months.

The best projects are never done, I guess.

I can make your "Pie-plate" Much lighter if you'd like.
http://www.vinmoto.org/gallery/v/VinMoto-Garage/album03/Godfferys-Garage-123/95/Brake+Rotors+_+Thinned+and+Drilled/
Yours would be in the top row, 3rd one over. These Rotors are nearly half the weight of stock and grab like the X-wife on her way out of the house.

You're always on my list.  Those phenolic pistons are a godsend.

Still looking for a way to reduce the diameter in addition to thinning and drilling.  What other Honda rotors fit the bolt pattern and offset but has a smaller OD?  '81 900F?
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline Godffery

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Re: 1975 Supersport, performance cafe
« Reply #442 on: October 06, 2013, 10:32:34 AM »

Have to laugh though.  The rear rotor is bigger than the front rotors.  Think I'll ditch the pie-plate and put some smallish, modern thing on there over the winter including an underslung Honda caliper.  Something interesting to research during the rainy months.

The best projects are never done, I guess.

I can make your "Pie-plate" Much lighter if you'd like.
http://www.vinmoto.org/gallery/v/VinMoto-Garage/album03/Godfferys-Garage-123/95/Brake+Rotors+_+Thinned+and+Drilled/
Yours would be in the top row, 3rd one over. These Rotors are nearly half the weight of stock and grab like the X-wife on her way out of the house.

You're always on my list.  Those phenolic pistons are a godsend.

Still looking for a way to reduce the diameter in addition to thinning and drilling.  What other Honda rotors fit the bolt pattern and offset but has a smaller OD?  '81 900F?

Actually if your after a smaller diameter, I can mount a CB550 front Rotor to the CB750F rear Carrier.

Offline mazen0822

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Re: 1975 Supersport, performance cafe
« Reply #443 on: October 11, 2013, 11:32:18 PM »

Have to laugh though.  The rear rotor is bigger than the front rotors.  Think I'll ditch the pie-plate and put some smallish, modern thing on there over the winter including an underslung Honda caliper.  Something interesting to research during the rainy months.

The best projects are never done, I guess.



I can make your "Pie-plate" Much lighter if you'd like.
http://www.vinmoto.org/gallery/v/VinMoto-Garage/album03/Godfferys-Garage-123/95/Brake+Rotors+_+Thinned+and+Drilled/
Yours would be in the top row, 3rd one over. These Rotors are nearly half the weight of stock and grab like the X-wife on her way out of the house.

You're always on my list.  Those phenolic pistons are a godsend.

Still looking for a way to reduce the diameter in addition to thinning and drilling.  What other Honda rotors fit the bolt pattern and offset but has a smaller OD?  '81 900F?

Actually if your after a smaller diameter, I can mount a CB550 front Rotor to the CB750F rear Carrier.

any more info on this?

Offline Godffery

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Re: 1975 Supersport, performance cafe
« Reply #444 on: October 12, 2013, 08:22:38 AM »
Just send me your stock one, I'll do the mods removing it from the carrier & replacing your 295.8mm rotor with a Drilled & thinned 276.1mm rotor, then send it back within 48hr's.

They are $88 each with your core, return shipping is $12.50 in the continental US.

 jstephens7@wi.rr.com

Offline Doctor_D

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Re: 1975 Supersport, performance cafe
« Reply #445 on: October 12, 2013, 08:35:28 AM »
I'll need to look at a few different calipers to see what works with a smaller rotor, but that seems like a good plan.

Maybe something like this:

Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline SOHC4 Cafe Racer Fan

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Re: 1975 Supersport, performance cafe
« Reply #446 on: October 12, 2013, 08:41:05 AM »
I'll need to look at a few different calipers to see what works with a smaller rotor, but that seems like a good plan.

Maybe something like this:



David,

I see that you are afflicted with a common condition: upgrade itis!  ;)

I love this build!
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 Godffery

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Re: 1975 Supersport, performance cafe
« Reply #447 on: October 12, 2013, 11:28:56 AM »
I'll need to look at a few different calipers to see what works with a smaller rotor, but that seems like a good plan.


That might do the trick ?
Your brake pad contact area for the 276.1mm rotor would be about 90mm to 137mm from center.

Offline scottly

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Re: 1975 Supersport, performance cafe
« Reply #448 on: October 12, 2013, 06:10:44 PM »
I'll need to look at a few different calipers to see what works with a smaller rotor, but that seems like a good plan.

Maybe something like this:


What bike does that caliper fit? It looks very similar to my '82 FT500, except the FT has an added boss for the brake stay. The FT rear rotor is the same OD as the 550: 276mm.
Don't fix it if it ain't broke!
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Offline Doctor_D

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Re: 1975 Supersport, performance cafe
« Reply #449 on: October 12, 2013, 07:15:26 PM »
It's from a 1981 cb900f.  No idea if it's even remotely likely to fit.

Now, the Ascot caliper is on my list to check as well.
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando