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Fork upgrade with emulators 01 Mar 2019 14:46 #799484

  • gordone
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CoreyClough wrote: 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.




Thank you for your input.
You have replaced the progressive spring to «normal» one?
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 03 Mar 2019 06:20 #799564

  • Kidkawie
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Besides the emulators a stiffer spring is a good idea. Also, dont forget about upgrading the shocks.
1975 Z1 900
1994 KX250 Supermoto
2004 KX125

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Fork upgrade with emulators 03 Mar 2019 07:41 #799570

  • gordone
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Kidkawie wrote: Besides the emulators a stiffer spring is a good idea. Also, dont forget about upgrading the shocks.


I have new shocks rear, what spring is best with emulator, not progressive?
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 03 Mar 2019 08:25 #799575

  • SWest
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gordone wrote:

Kidkawie wrote: Besides the emulators a stiffer spring is a good idea. Also, dont forget about upgrading the shocks.


I have new shocks rear, what spring is best with emulator, not progressive?



I have progressives, emulators are next then a fork brace.
Steve

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Fork upgrade with emulators 03 Mar 2019 09:02 #799583

  • seanbarney41
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Guys, Racetech strongly recommends NOT to use progressively wound springs with emulators. Don't get confused...Progessive brand springs are not necessarily always built with a progessively wound spring rate, although I think that is primarily what they sell. A progressively wound spring should not be used with emulators because it would require changes to the damping adjustment at different points in the springs compression.

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Fork upgrade with emulators 03 Mar 2019 09:16 #799588

  • 9er rider
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I bought the springs, spacers and emulators from race tec also the oil but Im now considering the fork brace from trozzi.
76 kz 900 1075 76 kz 900 a4 78 kz 1000 ltd

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Fork upgrade with emulators 05 Mar 2019 04:47 #799748

  • CoreyClough
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gordone wrote:

Thank you for your input.
You have replaced the progressive spring to «normal» one?


I'd recommend getting the springs from RaceTech as well as the emulators. Follow their instructions.
'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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Fork upgrade with emulators 16 Jan 2021 11:26 #841813

  • blipco
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I see that YSS also makes an emulator, allegedly a Race Tech rip off.
Does anybody have any info about the YSS units?
"Swim against the current, even a dead fish can go with the flow"-somebody (I forget Who)

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Fork upgrade with emulators 18 Jan 2021 23:35 #841989

  • Irish Yobbo
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blipco wrote: I see that YSS also makes an emulator, allegedly a Race Tech rip off.
Does anybody have any info about the YSS units?


There's not much info about them, but essentially they're the same. I looked into them, and the main difference seems to be after-purchase support - racetech have good guides on how to tune them and are helpful with their feedback. Whether the guides are useful or not is another question - a lot of people have said that their guides make the ride very harsh since they're expecting a track setup or similar.

I was initially going to use YSS with their springs as they are cheaper and more readily available in Australia. I decided not to after fitting longer spacers and thicker oil made my current suspension acceptable.
1981 KZ750 LTD
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Fork upgrade with emulators 19 Jan 2021 17:22 #842042

  • blipco
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I have found AR-25 emulators at Traxxion Dynamics. They are emulators with machined damper rods that use a cartridge valve instead of just a pop-off valve.
He will have something for my bike as it has 41mm forks.
"Swim against the current, even a dead fish can go with the flow"-somebody (I forget Who)
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Fork upgrade with emulators 22 Feb 2021 06:33 #843854

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Well I purchased the AR-25 from Traxxion Dynamics. They had not worked on zr7s forks before so we became pen pals for a couple of days. They asked for certain measurements and photos via the internet.
In the end they sent new springs, spacers and cnc machined damper rods with real shim stack valves (instead of a pop-off valve) and the proper oil.
The stack was set up for my riding style.
They are beautiful units and the install went without a hitch. They are easily worth the extra money compared to the Race Tech emulators owing to the fact that you get real valves and strurdy damper rods. The hydraulic lock is not reused however.

Of course the forks are still sitting in my kitchen so I can't give a ride review. The bike is still scattered all over the house.
As soon as the weather cooperates I'll go outside to clean and rebuild the carburetors then start piecing it back together.

Anybody considering a fork upgrade should certainly consider these units.
As for support after the purchase, they have emailed me to let me know they are interested in my impressions once the riding season starts.
"Swim against the current, even a dead fish can go with the flow"-somebody (I forget Who)
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Fork upgrade with emulators 22 Feb 2021 11:24 #843871

  • gordone
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blipco wrote: Well I purchased the AR-25 from Traxxion Dynamics. They had not worked on zr7s forks before so we became pen pals for a couple of days. They asked for certain measurements and photos via the internet.
In the end they sent new springs, spacers and cnc machined damper rods with real shim stack valves (instead of a pop-off valve) and the proper oil.
The stack was set up for my riding style.
They are beautiful units and the install went without a hitch. They are easily worth the extra money compared to the Race Tech emulators owing to the fact that you get real valves and strurdy damper rods. The hydraulic lock is not reused however.

Of course the forks are still sitting in my kitchen so I can't give a ride review. The bike is still scattered all over the house.
As soon as the weather cooperates I'll go outside to clean and rebuild the carburetors then start piecing it back together.

Anybody considering a fork upgrade should certainly consider these units.
As for support after the purchase, they have emailed me to let me know they are interested in my impressions once the riding season starts.


Nice !

Looking forward to get driving reports from you :)

These is a upgrade I want todo next winter.

What modifcation is needed on the fork itself? drilling bigger wholes in the xxx don`t know what they is called, to let he oil flow without restriction, is these the only modifcation needed?
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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