Re-springing a 2017 Alta Redshift MX (and then revalving too)

[Philip]

You can call Bryan at N2Dirt in Santa Clarita cal 661-252-0269. He been working on mine and it’s working great.

Thanks, Fog. This is then one more option for the MXR suspension.

 

[WoodsWeapon]

Kreft and N2Dirt are both topshelf tuners, but that revavle control Kreft offers is very intriguing.

 

[Silent But Dirty]

Has anyone with a 2017 had an issue with the nitrogen bypassing the resivoir piston?

 

[Philip]

Has anyone with a 2017 had an issue with the nitrogen bypassing the resivoir piston?

It's a very popular KTM WP shock. It should be pretty robust, else everyone would have heard about it.

 

[Fod]

Has anyone with a 2017 had an issue with the nitrogen bypassing the resivoir piston?

How did you diagnose that?

 

[Silent But Dirty]

How did you diagnose that?

I didn't, my suspension company did.

They say it's common to see poor qc of the anodizing thickness inside the cannister, which can lead to nitrogen bypassing the piston band. My bike is only at 20hrs and the tech said the nitrogen was already 50psi low, as well as showing signs of contamination in the oil.

 

[Fod]

I didn't, my suspension company did.

They say it's common to see poor qc of the anodizing thickness inside the cannister, which can lead to nitrogen bypassing the piston band. My bike is only at 20hrs and the tech said the nitrogen was already 50psi low, as well as showing signs of contamination in the oil.

Yeah leaking to atmosphere the ifp pressure is different then bypassing the piston and causing cavitation of the oil. If you like the piston design over a bladder, I recommend the tank if you end up changing it out. Either way look out for other designs that are longer and may interfere with subframe.

 

[Silent But Dirty]

Yeah leaking to atmosphere the ifp pressure is different then bypassing the piston and causing cavitation of the oil. If you like the piston design over a bladder, I recommend the tank if you end up changing it out. Either way look out for other designs that are longer and may interfere with subframe.

Thanks for the heads up.

 

[Philip]

If you like the piston design over a bladder, I recommend the tank if you end up changing it out.

What is "the tank"?

 

[Silent But Dirty]

What is "the tank"?

I would assume he's talking about the resivoir.

 

[Fod]

Yeah, the tank is made by mx-tech I believe

 

[Duncan]

Philip, Thanks for sending the factory developed MX suspension specs.

Out of curiosity I compared the shim stacks in my EX with your chart and summarize as follows:

Base valve shims - mine are exactly same as your MX Alta says.

(why do you not list the four 6 X 28 X .15 shims in your actually on MX, were they really not installed?)

Mid-Comp - I did not dismantle.

Rebound - mine are dramatically different from MX Alta says and actually on MX and Alta MX team.

 

[Philip]

(why do you not list the four 6 X 28 X .15 shims in your actually on MX, were they really not installed?)

Good catch! I must have forgotten to list them after I found them. I only bought eight extra 6 X 28 X .15 shims for both legs, whereas the specs call for 16 shims total.

 

[Silent But Dirty]

I've finally gotten my 2017 MX back from being valved to the specs Phillip obtained from Alta.

This has completely changed the behavior of the bike for the better. Clearing jumps is so much easier, and I now have the confidence to hammer through whoops!

I have gotten my fork compression dampening out 22 clicks, and it's still at bit harsh, so I am going to try lowing the oil height a bit and see if I like that better.

There was one issue on the shock, where the anodizing in the resivoir is of poor quality, which allowed nitrogen to bypass the piston and mixinto the oil.

Putting a bladder kit in was not an option, as it seems this resivoir was made special for the Alta in order to clear the subframe. New resivoir had to come all the way from Austria.

 

[Josh402]

I finally got around to doing something. I’m sending my suspension to EVO Industries, since they have a shop on the eastern side of the country, I’m giving them a shot.

 

[Josh402]

Got the bike back together last night. I tell you what, guys. Even if you ride as slow as I do, a revalve on the MX is a MUST DO. The landings are nowhere near as harsh, it launches in the air much better, and if I case a jump, it doesn’t try to buck me over the handlebars.

 

[Don Thuren]

Awesome thread I think I'm going to go through tuning my 2017 MX myself. Been wanting to dabble in moto suspension more anyways so good excuse to do it!

 

[Don Thuren]

Philip I see in your specs you used the Race Tech compression base, which I was planning on using too.

Did you try the Race Tech low-speed control kit at all, or thoughts on that?

 

[Philip]

Philip I see in your specs you used the Race Tech compression base, which I was planning on using too.

Did you try the Race Tech low-speed control kit at all, or thoughts on that?

Yes, I did use the RaceTech base valves. You also have to flip the white/right leg compression needle valve upside down so that you have two rebound clickers at the top and two RT compression clickers at the bottom.

I am not familiar with the RT low-speed control kit, sorry.

 

[Don Thuren]

Sweeeeeet yeah saw that with the check needles totally makes sense. I may do the LS bleed kit too, as I hate suspension that is TOO mushy....