Author Topic: Dry clutch on CB750  (Read 131743 times)

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Offline simon#42

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Re: Dry clutch on CB750
« Reply #75 on: October 30, 2009, 10:38:44 AM »
well done rob that looks great , i take it you have taken a proven clutch and adapted it for the honda? [ i dont mean that as any disrespect, it would be the practical way of doing it ]

Offline voxonda

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Re: Dry clutch on CB750
« Reply #76 on: October 30, 2009, 12:15:57 PM »
On a serious side note, what are your plans for making more/selling? Also what clutch plates are you using? I'm assuming that you have to use plates that are meant to be dry? I know the plates on my Ducati are fairly similar looking to the plates on my other bikes...but the material must be different?

mmmm lekker koppeling! 

This clutch is made by as a one off but when there would be enough interest we'll build a small badge. A few parts are from the GSX-R Limited edition and rather expensive, so even these parts will be made to keep the price affordable. Plates are also from GSX-R LE.

mmmmm dat is zeker!
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Offline voxonda

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Re: Dry clutch on CB750
« Reply #77 on: October 30, 2009, 12:23:33 PM »
compliments! looks very nice, good work!

casting of the cover is zer cool indeed

when are you starting work on a 500/550 version?  ;)

TG

Thanks but the credit has to go to the man who actually build it, the cover is a adapted original which is welded to the 'basket'. The final covers will be milled from billet.
Who knows, maybe if time permitted??

Rob
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Offline simon#42

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Re: Dry clutch on CB750
« Reply #78 on: October 30, 2009, 12:39:46 PM »
the gsxr plates should be more than up to the job

Offline bucky katt

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Re: Dry clutch on CB750
« Reply #79 on: October 30, 2009, 02:44:27 PM »
any clue whatever what the cost is going to be like?
Of all God's creatures there is only one that cannot be made the slave of the lash. That one is the cat. If man could be crossed with the cat it would improve man, but it would deteriorate the cat.
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Offline Retro Rocket

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Re: Dry clutch on CB750
« Reply #80 on: October 30, 2009, 03:23:54 PM »
WOW, great work Rob.... :o

Mick
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline turboguzzi

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Re: Dry clutch on CB750
« Reply #81 on: October 30, 2009, 03:32:20 PM »
gee rob, from all bikes on earth to take parts from an LE GSXR? Guess it must be from a 90's model, oil cooled or early water cooled?

These parts must be really hard to find.

Ducati's clutches are built for quite high torque (two big lumps instead of four smaller ones), could be a good source for parts.




Offline Bill/BentON Racing

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Re: Dry clutch on CB750
« Reply #82 on: October 30, 2009, 04:38:54 PM »
TG probably from '86?,Bill
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
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Offline bwaller

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Re: Dry clutch on CB750
« Reply #83 on: October 30, 2009, 05:46:11 PM »
A friend has an 86 LE & it's a dry clutch

Offline J.Webster Designs

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Re: Dry clutch on CB750
« Reply #84 on: October 30, 2009, 06:05:02 PM »
what are replacement parts going to look like price wise?
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Offline MRieck

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Re: Dry clutch on CB750
« Reply #85 on: October 30, 2009, 06:21:30 PM »
A friend has an 86 LE & it's a dry clutch
You're too old to know somebody with an 86. ;) ;D When you figure it out Rob give an approximate cost. With help we can do anything for these bikes....I know. ;)
Owner of the "Million Dollar CB"

Offline Bill/BentON Racing

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Re: Dry clutch on CB750
« Reply #86 on: October 30, 2009, 08:22:49 PM »
This is way cool,I want one!Bill
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
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Offline voxonda

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Re: Dry clutch on CB750
« Reply #87 on: October 31, 2009, 01:29:11 AM »
Thanks for all the positive energy! Some parts are from a '86 GSX-R LE.
Like Mike says, with help there is a lot we can do for our beloved 750.
At this point cannot say anything about cost, there are some small issue's to be worked out, and of course the testing.
But we'll keep in touch won't we?

Rob
Better sorry for failing then for the lack of trying.

Offline Retro Rocket

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Re: Dry clutch on CB750
« Reply #88 on: October 31, 2009, 02:04:48 AM »
Hi Rob, how hard would that be to do as a hydraulic set up  instead of cable.? I've been thinking of converting mine to hydraulic using 80's gsxr 750 parts that i have.

Mick
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline voxonda

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Re: Dry clutch on CB750
« Reply #89 on: October 31, 2009, 02:14:07 AM »
Hi Rob, how hard would that be to do as a hydraulic set up  instead of cable.? I've been thinking of converting mine to hydraulic using 80's gsxr 750 parts that i have.

Mick

Hey Mick,

That is what could be a accesory for this clutch, but we made the decision to make it cable operated. To convert it is not a big problem.

Rob
Better sorry for failing then for the lack of trying.

Offline mec

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Re: Dry clutch on CB750
« Reply #90 on: October 31, 2009, 02:20:40 AM »
cable operated is better..........less weight, cheaper, less trouble

there are serious racers who convert their modern race bikes to cable operation

mec
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Offline voxonda

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Re: Dry clutch on CB750
« Reply #91 on: October 31, 2009, 06:12:18 AM »
Hey mec,

I agree, but when using on the public roads hydraulic is nice.

Rob
Better sorry for failing then for the lack of trying.

Offline lordmoonpie

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Re: Dry clutch on CB750
« Reply #92 on: October 31, 2009, 06:38:29 AM »
Very very nice Rob, just two questions:

1. How much do you think it'll be and
2. Will you do an option so I don't have to have pink clutch springs?!

 ;D
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1951 Ducati 50cc Cucciolo
1981 Yamaha XV750 SE

Offline voxonda

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Re: Dry clutch on CB750
« Reply #93 on: October 31, 2009, 06:51:33 AM »
Very very nice Rob, just two questions:

1. How much do you think it'll be and
2. Will you do an option so I don't have to have pink clutch springs?!

 ;D

Hey LMP,
Can/will not say anything about costs, first have to be sure everything works fine.
I just knew someone had to see that pink! First my stand and now this, looks like I must have a strong feminin side. ;D ;D

Rob
Better sorry for failing then for the lack of trying.

Offline kos

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Re: Dry clutch on CB750
« Reply #94 on: October 31, 2009, 07:22:03 AM »
Most dry clutches are out in the open and get a great deal of cooling. By the nature of the SOHC Honda case design this clutch is buried way back out of any air stream.   Your going to need a big scoop to direct air back where it is located....IMHO.


KOS


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Offline voxonda

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Re: Dry clutch on CB750
« Reply #95 on: October 31, 2009, 07:45:54 AM »
Thanks Mark,

It is something we thought about, but studying several different 'models' and looking at the DOHC superbike clutch, am thinking that a scoop in the fairing will be sufficient. Unfaired no problem.

Rob
Better sorry for failing then for the lack of trying.

Offline Bill/BentON Racing

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Re: Dry clutch on CB750
« Reply #96 on: October 31, 2009, 05:35:10 PM »
I can test one,unfaired! ;D ;D,Bill
BentON Racing Website
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline voxonda

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Re: Dry clutch on CB750
« Reply #97 on: November 01, 2009, 06:16:25 AM »
You would be welcome, if it had not been for my present build. Will make a great "test bike".
Sorry mate. ;)

Regards, Rob
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Offline Bill/BentON Racing

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Re: Dry clutch on CB750
« Reply #98 on: November 01, 2009, 07:30:36 AM »
Ok,I understand ;),I do need your mtr mounts tho,how to we do it? Thanks,Bill
BentON Racing Website
OEM Parts | Service | Custom Builds
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline voxonda

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Re: Dry clutch on CB750
« Reply #99 on: November 01, 2009, 07:52:16 AM »
I'll PM you.

Rob
Better sorry for failing then for the lack of trying.