Author Topic: The Quest for Brakes and Suspension: GSX-R Treats  (Read 56645 times)

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Offline Syscrush

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #175 on: April 30, 2014, 05:31:11 PM »
Great build.  How did I miss this! I will go through your thread but I am curious about the front wheel mount. What was the process?
1. Buy hub that's designed for GSX-R front end.
2. Lace it to the old rear rim.
3. Bolt on the GSX-R rotors.
4. Put it in the forks like it was made to go there.  Because it was.
Life is precious: wear your f'n helmet!
There's nothing more expensive than a free bike...
FWIW, I'm not a shill for Race Tech - I've just got a thing for good suspension and the RTCE's are the most cost-effective mod for these old damping rod front ends.

Offline sethdhawkins

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #176 on: April 30, 2014, 05:33:47 PM »

Great build.  How did I miss this! I will go through your thread but I am curious about the front wheel mount. What was the process?
1. Buy hub that's designed for GSX-R front end.
2. Lace it to the old rear rim.
3. Bolt on the GSX-R rotors.
4. Put it in the forks like it was made to go there.  Because it was.

What he said. Some guys are running 17" front wheels... I'm not sure my stator cover would survive.
All a man needs in this world is someone to love, if you can't give him that, give him hope, if you can't give him hope...just give him something to do!

1972-ish CB750K
1974 CB450
1974 CB360
1976 136' Ocean Going Tug

Offline Tews19

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #177 on: April 30, 2014, 06:29:22 PM »
Syc- I thought gsxr wheels are not spoked.... I am sure I could buy cognito's hub but the price is to much. I will follow Socomoto path for adapting the gsxr axle to a harley hub.
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Offline Terry in Australia

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #178 on: April 30, 2014, 11:19:42 PM »
Like this?

http://www.permatex.com/products-2/product-categories/gasketing/gasket-makers/permatex-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker-detail

I honestly never knew they made this.

No, the stuff on my Triumph is clear Seth, but if you can't find it I suppose the Ultra-Copper would be OK, I used some blue RTV silicon sealant when I installed the "Luftmeister" pipe on my BMW K100RS, and it stunk for the first couple of rides, but now the stench has gone, it's still sealing well. Cheers, Terry. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Terry in Australia

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #179 on: April 30, 2014, 11:53:59 PM »
Syc- I thought gsxr wheels are not spoked.... I am sure I could buy cognito's hub but the price is to much. I will follow Socomoto path for adapting the gsxr axle to a harley hub.

You don't need to buy the special hub mate, but to make a CB750 hub work with a later model front end, you'll need to get some adapter plates made to match the hub to the new brake discs, modify the speedo drive (if you're going to run the OEM speedo) and either change the wheel bearings or modify the new axle to make it fit the CB750 hub.

Here's a pic of "Goldie" with the Yamaha FZR1000 41mm forks, brake rotors and calipers mated to my K2 frame and front hub, laced into a wider 18" alloy rim. It all worked very well, but there was a fair bit of machining involved to make it work. Cheers, Terry. ;D



I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline SOHC4 Cafe Racer Fan

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #180 on: May 01, 2014, 12:07:44 AM »
Syc- I thought gsxr wheels are not spoked.... I am sure I could buy cognito's hub but the price is to much. I will follow Socomoto path for adapting the gsxr axle to a harley hub.

You don't need to buy the special hub mate, but to make a CB750 hub work with a later model front end, you'll need to get some adapter plates made to match the hub to the new brake discs, modify the speedo drive (if you're going to run the OEM speedo) and either change the wheel bearings or modify the new axle to make it fit the CB750 hub.

Here's a pic of "Goldie" with the Yamaha FZR1000 41mm forks, brake rotors and calipers mated to my K2 frame and front hub, laced into a wider 18" alloy rim. It all worked very well, but there was a fair bit of machining involved to make it work. Cheers, Terry. ;D





Outstanding!
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 timbo750

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #181 on: May 01, 2014, 12:56:59 AM »
Syc- I thought gsxr wheels are not spoked.... I am sure I could buy cognito's hub but the price is to much. I will follow Socomoto path for adapting the gsxr axle to a harley hub.

You don't need to buy the special hub mate, but to make a CB750 hub work with a later model front end, you'll need to get some adapter plates made to match the hub to the new brake discs, modify the speedo drive (if you're going to run the OEM speedo) and either change the wheel bearings or modify the new axle to make it fit the CB750 hub.

Here's a pic of "Goldie" with the Yamaha FZR1000 41mm forks, brake rotors and calipers mated to my K2 frame and front hub, laced into a wider 18" alloy rim. It all worked very well, but there was a fair bit of machining involved to make it work. Cheers, Terry. ;D




Terry, that looks awesome. It looks like a factory fit, what was the reason for FZR front end, did it fit well or was it just handy at the time?

Offline Terry in Australia

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #182 on: May 01, 2014, 01:29:32 AM »
Thanks mate, I bought it as a crashed wreck, the PO is a guy called Ken Piper who is an old race-bike builder and mechanical engineering lecturer, who crashed it at 60 MPH and destroyed pretty much everything except the frame, engine and triple trees.

He'd done a magnificent job machining the billet triples for the Yam forks, so I just found a straight set of tubes and re-used them. The bike had done several somersaults, destroying the forks, headlight, gauges, bars, seat, fenders, fuel tank, oil tank, handlebars, levers, switchblocks, footpegs etc. I found the speedo needle under the cam chain tensioner! Ken tore off both of his kneecaps in the process, and when I bought the wreck, he'd only been walking again for a few weeks after almost a year on crutches.

So my contribution really was just a cosmetic resto, the only bits I machined were the brackets for the front fender. I did do a GSXR front end conversion on a Suzy GS1000 a few years prior and that worked well, especially after I had some special screw in fork tube extensions machined to lengthen the forks by 3 inches.

Here's a couple of pics I took when I picked up the bike, that's Ken sitting on it with his newly repaired knees. Cheers, Terry. ;D





I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline sethdhawkins

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #183 on: May 01, 2014, 01:57:11 AM »
Very nice, Terry.
All a man needs in this world is someone to love, if you can't give him that, give him hope, if you can't give him hope...just give him something to do!

1972-ish CB750K
1974 CB450
1974 CB360
1976 136' Ocean Going Tug

Offline Terry in Australia

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #184 on: May 01, 2014, 01:58:56 AM »
Thanks Seth, and apologies for the thread jack. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline sethdhawkins

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #185 on: May 02, 2014, 06:00:13 AM »

Thanks Seth, and apologies for the thread jack. ;D

It's never a thread jack when you provide photos like that ;)
All a man needs in this world is someone to love, if you can't give him that, give him hope, if you can't give him hope...just give him something to do!

1972-ish CB750K
1974 CB450
1974 CB360
1976 136' Ocean Going Tug

Offline rickmoore24

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #186 on: May 02, 2014, 09:55:18 AM »
Terry, 'Golidie" looks amazing and goes as good as she looks I'm sure. Well done sir!

Seth, your build is looking killer too. I'm in the midst of a front end conversion myself. I have to wait on the spoked front conversion though, I'd like the Cognito hub setup laced to my stock front wheel but it's steep pricewise, for me anyway. So I'll be running the stock mag wheel this season. I know, I knoowww..... :( LOL

1972 CB750 K2 (Daily Runner)
1972 CB750 K2 (Sold)
1973 CB750 K3 (Hardtail 836cc)
1998 CBR F3 - R.I.P., went down on the 101 in Calabasas, Ca.
1995 EG6

Offline SOHC4 Cafe Racer Fan

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #187 on: May 02, 2014, 11:30:13 AM »
I had a machinist mill me similar hub to disc adapters for my Bionic Mongrel 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 sethdhawkins

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #188 on: May 02, 2014, 11:34:27 AM »


I forgot what a biotch the carbs were to get on. Bevel the fronts, and bake 'em at 350.
All a man needs in this world is someone to love, if you can't give him that, give him hope, if you can't give him hope...just give him something to do!

1972-ish CB750K
1974 CB450
1974 CB360
1976 136' Ocean Going Tug

Offline SOHC4 Cafe Racer Fan

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #189 on: May 02, 2014, 11:43:48 AM »
Butter them up! Hope your toast doesn't taste like rubber!  ;)
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 sethdhawkins

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #190 on: May 02, 2014, 01:06:19 PM »

Mmmmmm...butter.

This is how much I bevel the edges on a stock boot to install the RS34's.

They're in! Much easier with a friend. I just about gave myself a hernia putting them in solo :-/
All a man needs in this world is someone to love, if you can't give him that, give him hope, if you can't give him hope...just give him something to do!

1972-ish CB750K
1974 CB450
1974 CB360
1976 136' Ocean Going Tug

Offline Syscrush

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #191 on: May 02, 2014, 01:24:22 PM »
Not much is sexier than a set of smoothbores.
Life is precious: wear your f'n helmet!
There's nothing more expensive than a free bike...
FWIW, I'm not a shill for Race Tech - I've just got a thing for good suspension and the RTCE's are the most cost-effective mod for these old damping rod front ends.

Offline rickmoore24

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #192 on: May 02, 2014, 02:52:42 PM »
Yeah, putting carbs back on is one of my least favorite things to do.
1972 CB750 K2 (Daily Runner)
1972 CB750 K2 (Sold)
1973 CB750 K3 (Hardtail 836cc)
1998 CBR F3 - R.I.P., went down on the 101 in Calabasas, Ca.
1995 EG6

Offline SOHC4 Cafe Racer Fan

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #193 on: May 02, 2014, 04:07:42 PM »

Mmmmmm...butter.

This is how much I bevel the edges on a stock boot to install the RS34's.

They're in! Much easier with a friend. I just about gave myself a hernia putting them in solo :-/

I've seen people ratchet them on with tie-down straps. Not looking forward to 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 Terry in Australia

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #194 on: May 02, 2014, 05:42:46 PM »
Those Mikuni's really are sexy looking carbs, I wish now that I hadn't pulled the trigger on a set of CR31's for my bike after I had a biatch of a time with my CR29's, but the only good thing is that they're much easier to install and remove than the Mikuni's.

I've just received a set of OEM K7/8 rubbers, so when I get around to it I'll install the CR's and hope they're easier to tune to my engine than the 29's were. Cheers, Terry. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline sethdhawkins

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #195 on: May 02, 2014, 07:08:28 PM »

Those Mikuni's really are sexy looking carbs, I wish now that I hadn't pulled the trigger on a set of CR31's for my bike after I had a biatch of a time with my CR29's, but the only good thing is that they're much easier to install and remove than the Mikuni's.

I've just received a set of OEM K7/8 rubbers, so when I get around to it I'll install the CR's and hope they're easier to tune to my engine than the 29's were. Cheers, Terry. ;D

I've often thought about grabbing a CR rack for comparison. Anybody wanna send me a set to check out? ;) I'll send 'em back to you with a six pack after I've made my conclusions. I wouldn't have been able to fine tune my carbs as much as I have, without the use of my wideband O2 sensor...it's almost cheating.
All a man needs in this world is someone to love, if you can't give him that, give him hope, if you can't give him hope...just give him something to do!

1972-ish CB750K
1974 CB450
1974 CB360
1976 136' Ocean Going Tug

Offline calj737

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #196 on: May 03, 2014, 04:40:22 AM »
I've got a set of 26's coming in about a week or so. Don't know if they would suit your purposes though. But happy to loan them out to you-
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Offline sethdhawkins

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #197 on: May 04, 2014, 12:20:25 PM »

I've got a set of 26's coming in about a week or so. Don't know if they would suit your purposes though. But happy to loan them out to you-

Lil' small, me thinks? I thank you anyway!
All a man needs in this world is someone to love, if you can't give him that, give him hope, if you can't give him hope...just give him something to do!

1972-ish CB750K
1974 CB450
1974 CB360
1976 136' Ocean Going Tug

Offline sethdhawkins

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #198 on: May 04, 2014, 12:23:48 PM »


Gentlemen! We have paint!
All a man needs in this world is someone to love, if you can't give him that, give him hope, if you can't give him hope...just give him something to do!

1972-ish CB750K
1974 CB450
1974 CB360
1976 136' Ocean Going Tug

Offline Syscrush

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Re: The Quest for Brakes and Suspension: GSX-R Treats
« Reply #199 on: May 04, 2014, 02:36:23 PM »
That is a very promising teaser!
Life is precious: wear your f'n helmet!
There's nothing more expensive than a free bike...
FWIW, I'm not a shill for Race Tech - I've just got a thing for good suspension and the RTCE's are the most cost-effective mod for these old damping rod front ends.