81 KZ550 Lowering the rear options

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16 Jun 2016 15:03 #731673 by Wildman1024
81 KZ550 Lowering the rear options was created by Wildman1024
I'm a pretty short guy. I'm pretty uncomfortable on my bike as I have to tippy toe. Was wondering if anyone tried shortening the spring a little on the stock shocks? If so how did you do it and did it work OK. Other option is to get some shorter shocks. Well...what works on this bike? Thanks

78 Kawasaki KZ650B
1973 Yamaha RD350
1983 Honda CB1100F

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16 Jun 2016 15:55 - 16 Jun 2016 15:56 #731676 by TexasKZ
Replied by TexasKZ on topic 81 KZ550 Lowering the rear options
Cutting the springs may not lower the rear at all and will certainly make the ride noticeably stiffer. Shorter shocks are the easiest way. You can also move the shock mounts.
I am assuming you are asking about a twin shock setup.

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
Last edit: 16 Jun 2016 15:56 by TexasKZ.

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16 Jun 2016 16:33 #731679 by Wildman1024
Replied by Wildman1024 on topic 81 KZ550 Lowering the rear options

TexasKZ wrote: Cutting the springs may not lower the rear at all and will certainly make the ride noticeably stiffer. Shorter shocks are the easiest way. You can also move the shock mounts.
I am assuming you are asking about a twin shock setup.


It would be for a twin shock setup.

Also if I cut the spring down the piston will not be able to over travel the spring. Could that not cause issues?

78 Kawasaki KZ650B
1973 Yamaha RD350
1983 Honda CB1100F

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16 Jun 2016 22:25 - 17 Jun 2016 05:23 #731711 by martin_csr
Replied by martin_csr on topic 81 KZ550 Lowering the rear options
Alternate shocks. I believe it was Andy-the-gringo who put Kawasaki Vulcan 500 shocks on his 550 Ltd. The stock 550 shocks are in the 13" range & I think the vulcans are about 11". get an eye-to-eye measurement before purchasing.
Some vulcan shocks are kinda fat at the bottom. so chain guard clearance could be an issue. maybe the bottom shroud can be removed? or get a set that don't have the shrouds. ebbaayy search = vulcan 500 shocks or en500 shocks.
EN500 shocks --- 12" eye-to-eye

After lowering the rear, you may want to lower the front about the same. one way is to install shorter spacers at the top of the fork springs. the diagrams don't show spacers, so you could cut the fork springs instead. cutting the forks springs may actually improve them. some guys cut the springs & install longer spacers to make up the difference, so it has been done.
Last edit: 17 Jun 2016 05:23 by martin_csr.

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17 Jun 2016 07:59 #731748 by Wildman1024
Replied by Wildman1024 on topic 81 KZ550 Lowering the rear options
Did some digging in the shed last night and found a new set of Hagons I ordered for my 73 RD350 build. They are 12.5" eye to eye. They mounted up perfectly with only 1 minor mod needed. I used the old lower bushing from the stock shocks and then they were a direct bolt in. The front of my bike has already been lowered 1.25". It's pretty amazing but now I can comfortably touch. Only thing that sucks is those shocks are expensive and I now have to order another set for my RD.

78 Kawasaki KZ650B
1973 Yamaha RD350
1983 Honda CB1100F

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17 Jun 2016 14:35 #731798 by Wildman1024
Replied by Wildman1024 on topic 81 KZ550 Lowering the rear options
Just went on a 107 mile ride. She is working great with new shocks.


78 Kawasaki KZ650B
1973 Yamaha RD350
1983 Honda CB1100F

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17 Jun 2016 16:27 - 17 Jun 2016 16:27 #731800 by 650ed
Replied by 650ed on topic 81 KZ550 Lowering the rear options
Your bike looks very nice! Hagon makes really nice shocks. I've had mine on my KZ650-C1 for 9 years and they still look and work like new. :) Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Last edit: 17 Jun 2016 16:27 by 650ed.
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