KZ650 Hydraulic Clutch

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06 Aug 2018 16:08 #788345 by GrantKZ650
KZ650 Hydraulic Clutch was created by GrantKZ650
Weird things happen when you stare at your bike too long.  The previous owner had ditched the electric starter, leaving a gaping hole in the side cover. The mismatched / road-rashed levers looked goofy. I had just installed an APE HD clutch and push rod roller kit. And there was an Honda RC51 clutch slave cylinder in my parts bin... 







 
The following user(s) said Thank You: Wozza, Scirocco, Saablord

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  • Scirocco
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  • Never change a running system
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06 Aug 2018 16:44 #788349 by Scirocco
Replied by Scirocco on topic KZ650 Hydraulic Clutch
A "nice" uprising sun Japanese war flag design.
Who made this hydraulic sprocket cover???

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06 Aug 2018 18:13 #788361 by GrantKZ650
Replied by GrantKZ650 on topic KZ650 Hydraulic Clutch
Thanks, I designed it in SolidWorks (top picture) and my buddy machined it out of 6061 aluminum
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07 Aug 2018 16:54 - 07 Aug 2018 16:56 #788425 by Scirocco
Replied by Scirocco on topic KZ650 Hydraulic Clutch
Can you duplicate this for a KZ 900/1000 sprocket cover???
I like the design and want to do a hydraulic clutch conversion on my Z1???
Last edit: 07 Aug 2018 16:56 by Scirocco.

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07 Aug 2018 18:34 #788432 by GrantKZ650
Replied by GrantKZ650 on topic KZ650 Hydraulic Clutch
I only have access to my KZ650 for design work. If I come across a Z1 I'll try to borrow it long enough to scan the motor and pull dimensions! 

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18 Jun 2020 19:15 #828427 by Saablord
Replied by Saablord on topic KZ650 Hydraulic Clutch
Hey Grant, if you're still active on here by chance, could you send me a drawing with the bolt pattern of the kz650 clutch cover? Thinking about using a zx9 slave on mine.

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18 Jun 2020 20:22 - 18 Jun 2020 20:22 #828429 by 650ed
Replied by 650ed on topic KZ650 Hydraulic Clutch

Saablord wrote: Hey Grant, if you're still active on here by chance, could you send me a drawing with the bolt pattern of the kz650 clutch cover? Thinking about using a zx9 slave on mine.


Egads - why? Since the maintenance and potential failure rate of a hydraulic clutch makes it much less desirable on a KZ650 than a cable clutch, what is the reason to switch? Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Last edit: 18 Jun 2020 20:22 by 650ed.

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18 Jun 2020 23:39 #828434 by davido
Replied by davido on topic KZ650 Hydraulic Clutch

Saablord wrote: Hey Grant, if you're still active on here by chance, could you send me a drawing with the bolt pattern of the kz650 clutch cover? Thinking about using a zx9 slave on mine.


I had real problems trying to get a ZX9r set up working on my Z1000. I spent ages messing around with the spacing,moving it out and moving it in trying to find the sweet spot. Couldnt do it. The reason,I was told, was that there wasnt enough travel in the ZX9r slave cylinder. I was advised to try a Ducati unit. Dont know how true this is but In the end,I got fed up with it and went back to the original cable set up.
If you get it working,Id be very interested in how you manage it.

www.kzrider.com/forum/11-projects/594313-csr1000-project-build
CB550 (1978)
CB500/4 (1972)*
KZ1000CSR (1981)
XT 600E (1999)
TDM900 (2003)

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18 Jun 2020 23:56 #828435 by cb900f
Replied by cb900f on topic KZ650 Hydraulic Clutch

Scirocco wrote: ...I like the design and want to do a hydraulic clutch conversion on my Z1???


One of these would be a lot simpler:

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19 Jun 2020 06:09 #828447 by Saablord
Replied by Saablord on topic KZ650 Hydraulic Clutch

cb900f wrote:

Scirocco wrote: ...I like the design and want to do a hydraulic clutch conversion on my Z1???


One of these would be a lot simpler:


Link doesnt work for me.

I have a heavier clutch and i wanted to give hydraulic a shot as i've never used one before.

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19 Jun 2020 08:59 #828457 by GrantKZ650
Replied by GrantKZ650 on topic KZ650 Hydraulic Clutch
Hey Saablord, I can send you dxf or step files - let me know if you can work with those.

I haven't had any problems with the hydraulic clutch in last two years and it worked first try (but I did spend a fair bit of time reverse engineering all the components first). I'll agree it has greater potential for catastrophic failure than a cable, but I have no more cable to lube or adjust :)

This hydraulic unit was used by Honda for the better part of a decade, so I guess I'll trust it to work and have replacement parts. Not that any of this is reason to do the switch. I really just did it so see if I could.

I'm not sure that style actuator linked will be that simple since we don't have that nice lever arm on our bikes

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19 Jun 2020 09:06 - 19 Jun 2020 09:06 #828458 by Saablord
Replied by Saablord on topic KZ650 Hydraulic Clutch

Hey Saablord, I can send you dxf or step files - let me know if you can work with those.

I use Inventor so either would work... send both? thank you! It will save me so much time.

I'm not sure that style actuator linked will be that simple since we don't have that nice lever arm on our bikes

...Yeah that style of slave (i opened the link in a new tab... now it works) would have to be mounted to the lever on the existing clutch rod actuator... sounds complicated and ugly.

I really just did it so see if I could.

hahaha. right there with you.
Last edit: 19 Jun 2020 09:06 by Saablord.

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