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suspension valving

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hey guys i was wondering if you can give me some opinions on this setup i have now. im a 145 lb b motocross with an 09 kx250f with .40 springs in the forks and a .47 in the shock and i think it has stock ics rates. these are my valve stacks

basevalve

31.1 x6

30.1 x3

24.1

30.1

29.1

28.1

26.1

24.1

23.1

22.1

21.1

20.1

19.1

18.1

16.1

16.1

midvalve

rebound:

nut

spacer

14.25

14.25

11.25

13.1

16.1

17.1

12.1

18.1

18.1

piston

comp:

20.1

20.1

20.1

19.1

17.1

13.1

17.1

17.1

shock

nut

spacer

washer

26.3

27.3

28.3

30.3

32.3

34.3

36.3

38.3

40.25

30.1

40.25 x3

piston

44.25 x4

44.2 x4

36.15

30.1

25.1

44.2

42.2

40.2

38.2

36.2

34.25

32.25

30.25

28.25

26.25

24.3

22.2

22.2

im having trouble with stability in the choppy straights and it feels like it wants to knife and headshake coming into corners like its sitting to low in stroke but exit corners on the gas the bike wants to push out.

Edited by lilmike7886

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Agreed!

Assuming you did the work??? Or just checking what was done already?

If you are a decent B rider, a good starting point would be the stock base valve stack with the mid you have and the springs your running. 145 in gear or 145 no gear?

With gear, I would say that puts you 155-160...and IMHO at too light a spring rate, however work on the valving first a little bit!

A stock base is close to this, I accidentally saved over the stock one with one I had done....but this should be close if I remember right!

6 x 31 6 0.10

6 x 30 6 0.10

2 x 29 6 0.10

28 6 0.10

27 6 0.10

26 6 0.10

25 6 0.10

24 6 0.10

23 6 0.10

22 6 0.10

21 6 0.10

20 6 0.10

19 6 0.10

18 6 0.10

17 6 0.10

16 6 0.10

EDIT: The bike has a tendency by design to push a little, some suspension changes can help...but ultimately..it's inherrent with the bike.

In your case, it's probably entering the corner very low in the stroke and rebounding as you go through and exit...thus making it want to push more than normal.

the rebound stack is similar to what I have run on a couple set ups...I think it's a good starting point.

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sorry i messed up on the basevalve. i just edited it. im 145 with no gear and the work was done by someone else. would i be better with a stiffer basevalve with a softer ics rate?

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I can not speak for everyone else here, but the ICS is merely a spring IMHO.

It is not anything beyond this and is not dynamic like the valving is...

You would still be better off stiffer on the base. Remove the 24 early in the stack, and instead of adding face shims, remove the 2 16's at the end and clamp off an 18.

that set up should put you ballpark, even still the spring sound a tad soft to me...but dont let that trick you into thinking you cant make what you have right now better.

Stack looks kinda MB1 ish...

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Hate companies that talk bad about other companies..... especially ones that have never done anything in the Indstry...

Edited by cruzer181

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Sorry i am lost, he said it looks MB1 ish, didnt say it was a bad setup?

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I will never use Harris performance!!! Hate companies that talk bad about other companies..... especially ones that have never done anything in the Indstry...

Can we just openly admit it at this point?

Your MB1...everyone knows it.

K thanks.

EDIT: Nice user name...you cruise the forum from time to time offering nothing but "yeay mb1, buy mb1" or to slight other individuals.

I remember while back in a thread where someone came on openly and honestly saying they had bad luck with mb1...and that they wanted a little help. You went beserk...and I believe were removed. Glad to see you back.

And I didn't say it was bad...I said it looks very MB1 like.

I am guessing the rider bought the bike set up from someone else...or just outgrew it and didn't want to spend the money...because he learned how to do the work himself.

If you weren't MB1, and you learned how to do your own work, wouldn't you???

Pretty simple concept.

Not to mention the simple fact I am not the only person who feels the base valve a tad soft for his comments and his stated ability....but it's ok, I'll be the punching bag. Not my product on the chopping block, yet..

When he tries somethign I suggest...and he has issues...and comes on here and says so...my goal would be to improve it...just saying :moon:

Edit number 2:

His first base valve stack posted showed only ONE face shim. He edited. However my FIRST comment was regarded the the FIRST stack he posted...which was innacurate.

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