Reshimming For A .90kg/mm Spring?

[R_Cote]

Interesting discussion, :thumbsup: Eddy i changed my setup yesterday, so here is some stack data for discussion. Compression remains unchanged at -

17 x 0.4

Showa 3 port surface dressed - bleed notches removed, with 1mm bleed

17 x 0.10

16 x 0.10 (2)

15 x 0.15

14 x 0.10

C 8.5 x 0.20

11.4 x 0.4

Rebound has seen the pistons changed from the 3 port Showas and is now -

17 x 0.4

Showa HMAS 4 port, surfaced dressed and refill ports drilled out to 3mm (2.8mm may have been better for reliability as there is very little metal left), bleed indentations are not completely removed

17 x 0.10

16 x 0.10

15 x 0.15

14 x 0.15

C 8.5 x 0.20

11.4 x 0.4

These are in a 5th gen that has Ohlins springs, CBR600F2 damper rods and firestorm fork bottoms/ callipers. I find fleabay usefull as pistons are difficult to obtain cheaply and it gives me shims too use, it also lets me see whats being used in other forks. For the curious the standard stacks in the 5th gen are:

Compression

17 x 0.4

Showa 3 port

17 x 0.15

17 x 0.1 (2)

C 8 x 0.2

11.4 x 0.4 (2)

Rebound

17 x 0.4

Showa 3 port

17 x 0.15 (2)

17 x 0.1 (3)

C 8 x 0.2

11.4 x 0.4

omo1.

Thanks for bringing your stack info to light.

I would like to comment on the last stack you mentioned. The rebound stack that is. Is that stack really a stock (unmodified) rebound stack? The stock stack info you mentioned in the 5th Gen. as follows.

17 x 0.15 ( 2 )

17 x 0.1 ( 3 )

clamp is 8 x 0.2

Were these the actual stock stacks in your 5th Gen? Because these are way different than what I found in my virgin Y2k forks.

My rebound stack was way lighter than that. My rebound stack is as follows.

17 x .1 (1)

16 x .1 (1)

15 x .1 (1)

8 x .2 clamp shim.

11.5 x .4 spacer shim.

Now take my stack and add race tech 1.0 springs and I now have a very bouncy ride. This info leads me to believe my rebound stack is way too light. I'm trying to decide how stiff I should go on my rebound stack to control the heavier rebound of my 1.0 springs. This has been a very interesting thread to follow.