sxf mod fork stack

basevalve compression

24.15

23.15

22.10

21.20

20.10

19.10

18.10

17.15

16.15x2

 

midvalve

18.10bleed

20.10x3

18.10

16.10

14.10

11.10

10.20

18.40

float 0.15

 

rebound

24d.10x3

12.10

18.10

16..10

14.10

12.10

11.20x2

 

thats is a good setup for sxf 250-350  many suggestion from mark rss and other from test on track .

 

Looks good!!

Edited by MRW

works great , last test today on hardpack , yesterday rain and today track was so destroyed and hard.on sxf 350 14

Both valves look lighter than before!..?

21.2?

sorry marcus 21.10|!!!!

Backer on the BV or are you using the 16x.15(2) as a semi flexi type backer?

Any idea on what the shock looks like?

my mod shock is

44.25x7

28.10

44.25

42.25

40.25

38.25

36.25

34.25

32.25

30.25

28.25

26.25

24.25

21.30

remove the bleed shim on compression adjuster

rebound

40.20x5

28.10

other stock.

drill piston 1.5mm bleedhole

installed bladder  10 bar pressure

and mxtech piston band 

Radical rebound stack

rebound have only more faceshim then old 2012 model

is 40.20x5

28,10

40

38.36.34.32.30.28 ..........is all stock as 2012 model. 

Ah stock after crossover sorry misread

You not like the 38mm face shim with a normal stack after

What bladder pressure you running on fork ?

1.1bar

My latest test has been with:
 

1.2 bleed hole (not necessary if you run the "ultralight" oil)

 

remove bleedshim in comp adjuster - add 2 face shims to comp adjuster 

 

4x44.25

38.10

30.10

6x44.25

stk after

 

Rebound 

5x40.2 stk afterwards

 

35 year old rider, I'd call him what we have a "C" young kid class racer - or a very good vet class rider, 175-180lbs

 

I am also going to play with a different highspeed cup washer soon - but for now it's stock.


In the front I added one 16.10 shim in the midvalve to tighten float, and I removed the delta shims and used 5 20.1 shims instead on the rebound, then added an addition 16.1 after the cross over.

The ktm fork is very light in low speed rebound damping stock.

 

 

I softened the base stack very minorly.

 

Running 380cc oil at the moment - most like will change up to restrictive seats and around 330cc in the future.


 

your shock is similar then my stack , not so far harris. 

removing the bleed on cadj is the first mod.

 

on midvalve the bleed shim works great.

I personally am finding the fork rebound the opposite of what i like....It's too quick in low speed return action (to light of low speed damping)

 

So the bleed shim, at the moment - is not what I am after.  But I will test with it if we head that direction!

i use stiff reb then stock . 18 shim and 1 point big , here in italy we ride mostly harpack . need a fast rebound

Have yall considered using a backer setup?.  Reason I post is that I think those stacks would be very stiff for me mid speed.  I was able to get good bottoming control while not killing my low and mid speed with the backer setup.  Theory being that the large port stock WP piston offers no flow restriction on fast hits and the backer can act as a tunable solution to add in some bottoming control (where as port flow restriction is not tuneable at all).  Lots of people have switched to a smaller port pds or other piston and are happy and I am assuming that port flow restriction on faster hits is the reason some like it better. 

 

I am happy with my backer set up for offroad.  I understand my stacks would be light for a fast mx rider but are posted here for the concept.  Would love to have others try it on the linkage bikes to gain some feed back.  In offroad, seems like everyone is just going to the smaller port piston.

 

 

My set up-

 

1.5 bleed stock piston

(6)44x.2 30x.15 44x.2 42x.3 40x.3 32x.25 30x.25 28x.15 (2)42x.3 26x.25

(2)24x.25

 

 

 

 For comparison to a typical stack, the below typical stack is equal to the above backer setup on low and mid speed events.  The below typical stack would bottom metal to metal harsh on larger hits.  The above backer stack is very controlled on those large hits. 

1.5mm Bleed hole     (6)44x.2 30x.15 44x.2 42x.2 40x.2 38x.25 36x.25 34x.25 32x.25 30x.25 28x.25 26x.25 24x.25 (3)22x.2

 

 

 

 

 

Adjuster 22x.1 19x.1 16x.1 22x.25 20x.2 18x.2 16x.2 14x.2 9x.3

 

 

 

Edited by Phil_S

Have not tested it  on the ktm.

KYB shocks on the 46mm set up used that concept - that plus the inlet area to the comp stack becomes a restriction.

I have machined custom backing plates machined the opposite direction of what you would do to lower a shock to test various peak deflection limits in the past.   It may be worth exploring on the ktm.

My personal opinion of the large port design however is the ultra low speed control - stack first opening is the "hardest" aspect to control like a smaller port...

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