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Getting The New Traxxion Dynamics AR-25 Damper Rod Kit On My R3

Chris12

Chris12

I ride a motorcycle
Joined
Nov 2, 2016
Location
Benicia
Moto(s)
Looking..
Name
Chris
Due to some great info I received in this thread , I decided to use Traxxion Dynamics for my fork upgrade. I contacted them and they offered to let me be one of the first customers to try out their new AR-25 Damper Rod kit for the R3.

The kit includes the new AR-25 Axxion Rods, springs for the intended use (street/race) and weight, pre-cut spacers, and oil, all in a clean neat package.
 
No modifications to the forks are required, so it’s a drop in installation.
 
I’ve opted to send my forks to Traxxion for them to install which includes ultrasonic cleaning, polished fork tubes, etc.  They will be really nice!

I don’t think the AR-25 Damper Kit is on their website yet, but here are some photos they shared with me:

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XeXMXGWtTzp6aSfFC2pJrieeu8J0THlGbVBxcUxsOUEQF6w-uvv8O8yxWEzCeyXb8oJAkoceHkQBNeDuuSa3SLBX8WoGTO7u7Gf8D4Un22jaOAYPCR_WaKz6SwIXUAhBeEzyXmzcUvQ


u_gpAZXwlELv_WqAIHmR76Ot3VB5uSMlZ5Sgg8LiScL1eU9SI9ipBXau5AYXTG3ut-cZpJe2eiyQiXqUlu59Lb2JEdjpOej61eO5dnZZ_h7-zFIQlbE9b-BFS3SeBWZM-lSow99Ne74
 
Junkie said:
Why did you pick Traxxion rather than RaceTech?
Click to expand...

I wasn’t aware of a damper rod kit Racetech made for the R3? I know they make emulators and fork springs..

But, I’ve heard nothing but great things regarding Taxxion and their damper rod kits for the R3. As far as price vs. performance I’ve heard they can’t be beat.
 
damper rod kit is nearly the same thing as an emulator. u just get a new damper rod included instead of having the modified the original.

the parts look really well made. thnx for the pics. I bet ull be quite happy w/ their performance.
 
I've been running a set of Traxxion AK-20 carts in my G1K for years. Totally satisfied with the performance.
 
I've had the Ak-20's in two of my other bikes I had. Good stuff!
 
Just got some more info from Traxxion on this kit. It’s basically an integration of their new 25mm Axxion valve into a damper rod kit.

Here’s an email I just got from them:

“So our previous kit was simply a high quality CNC machined rod that made it so you didn’t have to do any of the work required to use a Race Tech Gold Valve.

The Gold Valve works ok, but is extremely crude. It is just a blow off valve for bumps with a small hole in it for low speed compression.

We have incorporated the complete compression valving assembly from our 25mm Axxion Valve kit into the head of the damper rod. This is as close to a cartridge fork as you can get… at less than half the price!”

For comparison, here is a picture of their previous kit:
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So rebound is still controlled by fork oil weight.
 
Chris12 said:
You definitely know more about this than I do.

How is rebound controlled on something like their AK-20 Axxion cartridges? Is it the expansion of the cartridge assembly/ springs?
http://traxxion.com/product/cartridge-kit-ak20y-r3/
Click to expand...
On a real cartridge setup, there's a valve with a shim stack that controls compression and another one that controls rebound.

Gold Valve Emulators (and I think these too, although I could be wrong) generally use a valve with a coil spring instead of a shim stack for compression, and then use a fixed orifice for rebound. That means that rebound is adjusted with oil (or hole size). An orifice for rebound can work fairly well because there isn't as large of a range of stroke speeds as on the compression side.
 
Junkie said:
On a real cartridge setup, there's a valve with a shim stack that controls compression and another one that controls rebound.

Gold Valve Emulators (and I think these too, although I could be wrong) generally use a valve with a coil spring instead of a shim stack for compression, and then use a fixed orifice for rebound. That means that rebound is adjusted with oil (or hole size). An orifice for rebound can work fairly well because there isn't as large of a range of stroke speeds as on the compression side.
Click to expand...

Thanks Daniel.

I just read more about it and that makes perfect sense. https://www.motorcyclecruiser.com/basics-cartridge-and-damping-forks

I think this kit will be perfect for me. I mostly canyon carve with the bike, and if my budget allows, I’ll put in some track time soon.
 
Chris12 said:
Thanks Daniel.

I just read more about it and that makes perfect sense. https://www.motorcyclecruiser.com/basics-cartridge-and-damping-forks

I think this kit will be perfect for me. I mostly canyon carve with the bike, and if my budget allows, I’ll put in some track time soon.
Click to expand...
They explain that poorly:

A dual-rate system would have one light and one heavy spring placed end to end. This system responds like the softer-rate spring for the first part of the travel. Then, when this soft spring is compressed fully—said to be coil-bound—the stiffer spring begins to compress.

In reality, both are compressing for the first part but after the soft part binds, only the firm part compresses.

However, their explanation of the damping parts is reasonable: with a fixed orifice damping force increases dramatically with velocity, and the reason for cartridges is to allow the orifice to effectively get bigger when velocity is higher.
 
Junkie said:
They explain that poorly:

A dual-rate system would have one light and one heavy spring placed end to end. This system responds like the softer-rate spring for the first part of the travel. Then, when this soft spring is compressed fully—said to be coil-bound—the stiffer spring begins to compress.

In reality, both are compressing for the first part but after the soft part binds, only the firm part compresses.

However, their explanation of the damping parts is reasonable: with a fixed orifice damping force increases dramatically with velocity, and the reason for cartridges is to allow the orifice to effectively get bigger when velocity is higher.
Click to expand...

Thanks again.

I just found this video by Max McAllister of Traxxion Dynamics which is pretty good too:
[youtube]BuEIFbk_U2w[/youtube]
http://www.youtube.com/v/BuEIFbk_U2w&sns=em
 
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