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TOPIC: Fork upgrade with emulators

Fork upgrade with emulators 16 Jan 2019 03:11 #796861

  • gordone
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I`m searching for information concerning upgrade my forks with emulators.
I assume these is something I cannot do myself ?

What company does these in Europe and US ?
Do I need some new parts ?

Somebody have some technical information concerning emulators ?
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Fork upgrade with emulators 16 Jan 2019 05:13 #796864

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Here's a good topic with pics from another Kawasaki forum. plus a couple of Racetech links & Racetech video.

Kawasaki motorcycle site >> Installing cartridge emulators in forks (there's pics.) by Hoyt-Clagwell

Racetech

Racetech


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Last edit: by martin_csr.

Fork upgrade with emulators 16 Jan 2019 08:18 #796872

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If I understand these correct can I install it with fork installed one the bike....

Why is not everybody install a emulator in each fork ? No brainer ? or ?
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Fork upgrade with emulators 16 Jan 2019 08:25 #796873

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From what I've read, you have to disassemble the forks & modify the damper rods, so you have to remove the forks from the motorcycle.

Why isn't the upgrade done more often? Possible reasons: Cost. Not a simple install. Not commonly known.


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Fork upgrade with emulators 16 Jan 2019 08:28 #796874

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martin_csr wrote: From what I've read, you have to disassemble the forks & modify the damper rods, so you have to remove the forks from the motorcycle.

Why isn't the upgrade done more often? Possible reasons: Cost. Not a simple install. Not commonly known.


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Yes I see that, but you are able to adjust without taking off the forks.

These is maybe a project for next winter :)
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Fork upgrade with emulators 16 Jan 2019 08:39 #796875

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I don't know how to adjust them. I haven't read that much about them & haven't read anything recently.




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Fork upgrade with emulators 16 Jan 2019 09:53 #796877

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martin_csr wrote: I don't know how to adjust them. I haven't read that much about them & haven't read anything recently.

He explain it in the youtube video.



....

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Fork upgrade with emulators 16 Jan 2019 10:03 #796878

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Race Tech emulators can be adjusted by taking off the fork cap and pulling the preload, main spring, and emulator out of the fork.

There's different emulator springs you can use to adjust the emulator and the preload can be changed as well.

***with the preload, I played around with mine using PVC pipe cut to the length I wanted to test. Once I found one I was happy with (riding a few miles to test) I cut some steel tubing to that length and used the steel one as my "permanent" pre load.

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Fork upgrade with emulators 16 Jan 2019 10:05 #796880

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martin_csr wrote: From what I've read, you have to disassemble the forks & modify the damper rods, so you have to remove the forks from the motorcycle.

Why isn't the upgrade done more often? Possible reasons: Cost. Not a simple install. Not commonly known.


.....


You need to drill (and deburr) some additional holes in the damper rod. Obviously a good time to do a thorough rebuild of the fork assembly.

Agree with your reasons on why it's not done. Absolutely worth the cost however

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Fork upgrade with emulators 17 Jan 2019 05:47 #796926

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Agree with your reasons on why it's not done. Absolutely worth the cost however

Yes, Hoyt Clagwell in that first link is the one who got me to thinking about making the upgrade. he's a big proponent of the cartridge emulators & has suggested them often over at that forum. Does anybody else make a device like that? I've never looked further than racetech. hee.

Gordone, here's a link about adjusting the racetech gold valve emulators. Racetech >> Tuning Guide .
It says the emulators have to be removed from the forks to be adjusted, but usually this can be done with the forks still mounted on the motorcycle.

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Fork upgrade with emulators 17 Jan 2019 06:33 #796929

  • BohicaBob
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I first installed Race Tech Cartridge Emulators and Race Tech springs on my '73 Z1-900. I was so impressed with the results that I also installed them on my '78 KZ1000. I found the task of installation fairly easy and straightforward.

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Fork upgrade with emulators 18 Jan 2019 05:02 #797004

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BohicaBob wrote: I first installed Race Tech Cartridge Emulators and Race Tech springs on my '73 Z1-900. I was so impressed with the results that I also installed them on my '78 KZ1000. I found the task of installation fairly easy and straightforward.


Did you use much time on tuning ?
1. Tuning the valve ?
2. Findings correct preload on the spring ?
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Fork upgrade with emulators 21 Feb 2019 19:28 #799031

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I recently installed racetech gold valves. Racetech gives preload and “tuning” starting point for each bike. Check out their site and read in their instructions.
I used their recommendations and it’s like night and day. I think I’m 7 turns in which is a tad hard so I’m gonna set them to 5 turns in and be done.

Forks have to be completely disassembled for the work that needs to be done.

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Fork upgrade with emulators 21 Feb 2019 23:43 #799034

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waktaylor wrote: I recently installed racetech gold valves. Racetech gives preload and “tuning” starting point for each bike. Check out their site and read in their instructions.
I used their recommendations and it’s like night and day. I think I’m 7 turns in which is a tad hard so I’m gonna set them to 5 turns in and be done.

Forks have to be completely disassembled for the work that needs to be done.


Thank you!

I think these must be a project for the next winter. So you have got a «new» bike now? :)

What about fine tuning do you need to completly dissamble the forks?
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Fork upgrade with emulators 22 Feb 2019 00:14 #799035

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you remove the fork cap and spring then fish out the emulator with a magnet. It can easily be done while one the bike. Race tech has pretty good instructions and tech support.
-Vic
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'78 kz1000 LTD long term project

'80 kz750G project

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Last edit: by DoctoRot.

Fork upgrade with emulators 22 Feb 2019 01:05 #799036

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Perfect :)
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Fork upgrade with emulators 22 Feb 2019 05:25 #799041

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I put Racetech emulators in my 750 forks. As mentioned, the forks need to be removed but the project is not difficult. And since the forks will be off that's a good time to grease or replace the steering head bearings too.

I installed Sonic springs and I'd say the springs made a bigger difference than the emulators. The emulators are nice and all but I don't notice a huge difference between them and the stock setup. I installed them and never pulled them to fine tune though. Maybe I should? I'm reasonably happy with the front end performance so I didn't find the need to experiment much.
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Fork upgrade with emulators 22 Feb 2019 13:32 #799075

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If you have clapped out old springs you're going to have a bad time.
-Vic
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'78 kz1000 LTD long term project

'80 kz750G project

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Fork upgrade with emulators 27 Feb 2019 17:09 #799353

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Sounds like you need to tune them. the dampening characteristics are gonna change in a very good way.

Did you leave the adjuster bolt alone? Mines are 7 turns in but they need to by 4 or 5 turns in instead.

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Fork upgrade with emulators 01 Mar 2019 04:33 #799438

  • CoreyClough
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I am running the Race Tech Gold Valves on my 85 GPz550, and love it. Previously I was running Progressive Suspension Springs only with the recommended oil level. Big difference in front end from then to now. Love it! Doing the Gold Valves, it disables the Anti-Dives. I still have them bolted on, but the brake lines to them are no longer there. Like that of the Ronco Grill, I set it and forget it. Been running this for a year now.



'85 GPz550(ZX550-A2)

GPz550 Base Manual --> tinyurl.com/ze5b3qo
GPz550 Supplement Manual --> tinyurl.com/h34d2o6
GPz550.com --> www.nwsca.com/scripts/gpz_forum_2005/default.asp
First Race Win GPz550 --> tinyurl.com/o5y3ftp

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