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ZRX1100/1200 KYB shocks on KZ750E?

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08 Dec 2021 20:53 #858850 by stinkfinger
ZRX1100/1200 KYB shocks on KZ750E? was created by stinkfinger
I need to replace my worn out KZ750 shocks.  It appears that ZRX takeoff KYBs can be found for $200-$300.  

A search revealed that this has been asked before, but I find conflicting information... "bolts right on"... "too long"... "too wide, interferes with chain".  Just looking to hear from someone who's actually done (or attempted) it.

Thanks!

1981 KZ750E, 2005 GasGas EC300, 2023 Husqvarna 701 Enduro

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  • ThatGPzGuy
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09 Dec 2021 05:46 #858853 by ThatGPzGuy
Replied by ThatGPzGuy on topic ZRX1100/1200 KYB shocks on KZ750E?
I have them on my GPz750. They are a little longer, interfere with the helmet lock (I removed it) and rubbed on my chain guard which I had to modify. 

Jim
North GA
2016 Yamaha FJR1300ES
1982 GPz750 R1
1974 Kawasaki H1
1976 Kawasaki KZ400
1979 Yamaha XS650 cafe'
2001 KZ1000P
2001 Yamaha YZ426
1981 Honda XR200 stroked in an '89 CR125 chassis
1965 Mustang
1967 Triumph GT6
1976 Bronco
"If you didn't build it, it's not really yours"
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09 Dec 2021 05:54 - 09 Dec 2021 05:54 #858854 by martin_csr
Replied by martin_csr on topic ZRX1100/1200 KYB shocks on KZ750E?
Since it's been answered already.  From the only KYB pair I saw on EB, my eyeballs tell me it's kind of obvious that the coil spring will rub the chain guard, since the spring extends almost all the way to the lower shock mount.  The lower section of KZ shocks below the springs is kind of narrow.
Last edit: 09 Dec 2021 05:54 by martin_csr.
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09 Dec 2021 08:23 - 09 Dec 2021 08:24 #858860 by stinkfinger
Replied by stinkfinger on topic ZRX1100/1200 KYB shocks on KZ750E?
Jim,

With the shocks being a little longer, and coming off of a heavier bike presumably having a stronger spring, how drastically did that affect your ride height?
Did you do anything to compensate for it (i.e. new or modify springs)?

Along those lines, with springs/dampening designed for more weight do they still work well on a 750 sized bike... in other words, would you do it again?

1981 KZ750E, 2005 GasGas EC300, 2023 Husqvarna 701 Enduro
Last edit: 09 Dec 2021 08:24 by stinkfinger.

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09 Dec 2021 09:01 #858864 by Nessism
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  • ThatGPzGuy
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09 Dec 2021 09:40 #858865 by ThatGPzGuy
Replied by ThatGPzGuy on topic ZRX1100/1200 KYB shocks on KZ750E?
I didn't notice any different in height and the rear suspension is a little firmer but I'm OK with that. The ZRX shocks are adjustable. Here is a pic of what I had to do to my chain guard. 
I'd definitely do it again. 

Jim
North GA
2016 Yamaha FJR1300ES
1982 GPz750 R1
1974 Kawasaki H1
1976 Kawasaki KZ400
1979 Yamaha XS650 cafe'
2001 KZ1000P
2001 Yamaha YZ426
1981 Honda XR200 stroked in an '89 CR125 chassis
1965 Mustang
1967 Triumph GT6
1976 Bronco
"If you didn't build it, it's not really yours"
The following user(s) said Thank You: stinkfinger

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09 Dec 2021 11:47 #858870 by Highway Magician
Replied by Highway Magician on topic ZRX1100/1200 KYB shocks on KZ750E?
I got rid of the 40 year old pogo-stick shocks, and installed ZRX shocks on my '82 GPZ1100.  Check for shock spring to chain clearance (it's real close).

You can keep most of the chain guard by removing some material, like they did with the ELR chain guard.  There's even a special bracket to stabilize
the chain guard (#11036).

You can see what the chain guard looks like on my GPZ, after it was trimmed.

At some point, I will probably have the shock moved outboard, using a new mount from Z1 Enterprises (part #DC104CL.  $9.95/ea.)

 

Motorcycle builder since 1973. Master Tech. Current bike: 1982 GPZ1100B2.
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09 Dec 2021 12:30 #858872 by Highway Magician
Replied by Highway Magician on topic ZRX1100/1200 KYB shocks on KZ750E?

Motorcycle builder since 1973. Master Tech. Current bike: 1982 GPZ1100B2.
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09 Dec 2021 15:26 #858876 by Highway Magician
Replied by Highway Magician on topic ZRX1100/1200 KYB shocks on KZ750E?
Here's a recent pic of my bike with the KYB shocks on it, and a pic of Eddie Lawson's personal KZ1000R.

You can see the special factory bracket to support the chainguard.  It's an easy part to fabricate.

 

Motorcycle builder since 1973. Master Tech. Current bike: 1982 GPZ1100B2.
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13 Dec 2021 16:42 #859029 by rstnick
Replied by rstnick on topic ZRX1100/1200 KYB shocks on KZ750E?
I've got ZRX1100 shocks on my '78 KZ650.
The ZRX and the KZ are both close to 500 lbs.
The shocks are longer than stock, so I raised the front end up to stock (had it lowered for years).
Ride is fine, I'd do it again.
The KZ doesn't have a chain guard:

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Rob
CANADA

Need a key for your Kawasaki? PM me

1978 KZ650 C2, 130K kms, Delkevic ex, EI, CVK32, PMC easy clutch, ATK fork brace, steering damper, braced swingarm, ZRX shocks, 18" Z1R front wheel.
2000 ZRX1100
2011 Ninja 250R - Wife's
2005 z750s (aka GPz750)
1978 KZ1000 project
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