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Discussion Starter #1
OK, So I've found that the rebound adjusters were both seized on my 950SM.
Also, the part that the rebound adjuster plunger fits into is pretty well corroded too - so a new one is on the way.

BUT!

I'm not experienced with these forks - never had one apart before, but looking at the shim stack, this doesn't feel right.
In these pictures, I've laid out the shim stack, the bottom of the pushrod is on the right..

On the underside of the stack, there are three sort of "triangular" shims.
These can't be guaranteed to always close off the ports of the piston - it depends where they are fitted, and there is no indexing.

Anyone got info on this please?
Unfortunately, the KTM tech publications or parts lists don't go into the shimming of this stack at all.

Cheers,

Mike.




32787


32786
 

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Discussion Starter #2
Sorted. The “delta” shims should be aligned over the ports! Perhaps this is what was wrong....
We will see....
 

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Is this any good to you ?


One other thing that I've heard of but never tested is that if the fuel pump fails you can get 100k on what's in the tank above the pump pick up, it sounds about right and is handy to know if you want to get home.

Hell, you might even find this of interest.

Forks.
Nil Pre Load, turn anti clockwise all the way.
Rebound, top of fork. 6 clicks from fully in
Compression, bottom of fork. 8 clicks from fully in.

Rear Shock.
Pre Load standard.
Rebound, bottom of shock. 22 clicks from fully in.
Compression, top of shock. 3 clicks from fully in.
High Speed compression. Top of shock. 1 full turn out.

Been using these settings for years, they work.
 

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Discussion Starter #4
Thanks for that.

This is my first foray into the innards of forks.
I had to dismantle the stack to get it off the rod, and it simply didn't make sense.
The Delta Shims were not all in line over the ports!
There are a few videos that show this setup on Youtube.
I think the out of line shims and the seized rebound adjusters go a long way to explain the wieird handling I've been having.

The KTM parts list for the SM doesn't show the shim stack at all, but it from other evidence out there, it seems that the shim stack on the rod end are the same as the adventure.
And there's a lot of info about that out there.

For the moment, I'm just going to reassemble to spec, and play with the adjusters to see what I like.

One question - how much (if anything) have you dropped the triple clamps down the fork legs?
The bike came with about 10mm drop, probably in an attempt to quicken the turn-in, but since I found issues in the forks, all bets are off on the previous setup.
I'll be doing the sag-checks etc as usual - once the parts arrive and I can put it all back together.
 

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I have a mechanic doing my forks when the cap removal tool arrives, also a friend of mine (550k away) is a suspension specialist (since 1996) and is doing my rear shock so I'll ask his advice and let you know, my forks are at the first indicator, I ride mostly on the road it and does speed up the steering but not so much that I noticed any huge difference, the travel remains the same, I did it to get my feet down at stops, try the settings I posted.

The single best mod I've made to my sm is the Corbin seat, the standard seat is so uncomfortable it should be actionable in the highest court in the land, with the Corbin the seat height drops an inch or so which is a big plus, because I have a top box mount on the back it was nigh on impossible to get the std seat on and off but with the Corbin it slips straight in, with the top box I haven't found any downsides and it is so convenient for everything I wouldn't be without it.

I was on a ride once with 3 others, a K1300r, a Monster 1100 and some sort of HD with a cute little armchair seat, we did about 300k non stop and pretty quickly, when we stopped for gas the others nearly needed a forklift to get them off their bikes, they literally couldn't walk, I was as fresh as a daisy, a combination of the seat and suspension, none better.

HD seat.



Corbin.
 
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