13 crf450r shock/fork

[Live2RideRide2Live]

Has anyone ripped apart a 13 450 shock or fork keen to see whats inside

[thumpinberry]

gary at g-force suspension technoligies is real close on a setup.we will test with him again on sunday

[mxracer515]

The shock is very similar to the 12 95 % the same..the fork is very different for example it has 21 face shims[ before the tapered portion ] on the base valve piston & the clicker needle orfice is very restricked.. while the mid is a 2 piece piston with strange looking stacks just looking at them. The shims in the base valve are 8mm id & the mid are even larger don't recall the id of those at the moment .another thing I thought strange was with the larger cartridge you would have large pistons with large shims. The PSF has smaller face shims than the fork on the 12.

I was actually surprised there is not more trick stuff inside just a larger cartridge with way different shims stacks , no mainspring & a very long top out spring. The seal at first glance looks the same but it is slightly different that the 12 seal.

I would post the stacks but i dont have access to my notes at the moment.. the forks are very easy to work on once apart. dont forget to let the air out first.

I made 2 mods to the forks while waiting for FC to get there testing done .I like to do my own suspension work I just dont have the time.

[Live2RideRide2Live]

Cool thanks for the info looks like you could run similar shock setups to last year with some changes. Did you think the forks were on the softer or stiffer side? And if you could would you posting std stacks when you have your notes handy. The bike still isn't released in aus just yet.

[jjy130]

I did post the shock compression stack if you do a search. I have the fork base valve stacks, I will try to get them up tomorrow if I remember. I think the suspension settings are decent for stock, still stiff in my opinion though.

[yam259]

Base Comp

8mm id

21-26.1

24.1

21.1

18.1

14.1

10.25

13.3

Base Plate

2-12.25

3-20.1

mid reb

3-27.1

15.1

24.1

22.1

20.1

17.1

2-15.15

3-16.31

Washer

Nut

mid comp

3-20.1

3-27.1

18.1

24.1

22.1

20.1

18.1

14.1

13.3

2-16.1

4-22.1

25x.40 base

2-18.1

6mm spacer

11mm od 8mm id

12.2 8mm id

Cup-2mm depth

12.2 8mm id

Drilled washer

Comp

10-44.2

40.15

4-42.15

40.2

38.2

34.2

30.2

26.2

22.2

21.3

Reb

4-40.2

28.1

40.3

38.3

36.3

34.3

32.3

30.3

29.3

28.3

27.3

26.3

[jjy130]

that looks like a good listing, only thing I would have to add is that the rebound on the base valve is no longer a check plate that is spring loaded. There is somewhat of a stack, I believe it was something like (4)24.1, I will look later but I'm pretty certain they were 24mm in diameter and there were 3 or 4 of them, might be off on the thickness

[Live2RideRide2Live]

awesome thanks for that. whats with 3 20x.10 off the face of the mid comp some sort of bleed

[racerfmx450]

The 3x20.1 are spacer shims.

The mid piston it'konkave so a preloadet stack its possible ( if you remove this shims the mid stack is preloadet 0,3mm.)

Makes sense?

[Live2RideRide2Live]

Yep I'm pickin up what your puttin down for sure I haven't been inside them. S

[Live2RideRide2Live]

Looks like they are pretty tuneable

[jjy130]

update on the rebound stack on the base valve,

(3) 27.1

10.2

11.25

I had a 23.1 in stead of 24.1 on the base valve compression stack, not that it's a huge difference

[Wooded]

Anyone know about how much float on the mid?

[yam259]

Anyone know about how much float on the mid?

I had between .7 and .8 mm

Such a large gap it was hard to measure. I believe the math says .8 but I would have to check my notes.

[Wooded]

From what I can see posted on TT and all the parts are the same minus the mid shim stack, the crf has about .2 more float than the kawi.

Why did they go to this type of valve? If you run this valve on Restackor it produces quite a bit more high speed dampening when compared to previous kyb mid's. I never liked this valve when it was on the 03/04 yz's.