New fork springs - what should i get ?

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by Alex_RO, Aug 28, 2012.

  1. woodchuckexc

    woodchuckexc Been here awhile

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    I'll chime in with my $.02 I really like my .64 SPS set up. I worked across the street from there shop for over a year and did a lot of testing on different set ups. .70 is great for spirited road rides of big hits off road but don't move as much as I like for smaller trail junk. Cheers!
    #41
  2. jon6.0

    jon6.0 Been here awhile

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    If they ship it via US Post Office, it shouldn't be too bad. Call Slavens also. If they won't ship USPS, you can have them sent to my house and I will ship them USPS to you myself.
    #42
  3. orange spy

    orange spy diddly squat

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    first of all, my respect for your offer.

    :freaky

    second, its not the shipping charges that make it expensive. its the custom charges from U.S to Europe.


    third I find it difficult to believe that there is no single shop, manufacturer, dealer that doesn't carry a 210mm spring in various rates in the whole E.U :huh

    is that true?
    #43
  4. Alex_RO

    Alex_RO Been here awhile

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    I have no idea if it's the same in Greece as in Romania, but if the value of the package is under 100$ or marked as Gift... there's no customs fee. Paired with the offer from the fellow inmate from above...you may want to investigate that :)

    I had a friend going to the US that gracefully accepted some extra hardware in his luggage on the return trip so i managed to avoid international shipping charges.

    Alex

    #44
  5. 2stroked

    2stroked Adventurer

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    Searching for info in spring rates I came across this so I guess I'm bringing this back from the dead.
    I just got .70 for my 990, I'm 230 and that rate makes sense considering my Beta 400 had .50 and it weighed 275, not sure how KTM came up with .48's for a 475lb bike, I put .45 my Husky WR250 and it's 240lbs?
    Can't wait to put these in and try it out.
    #45
  6. gearheadE30

    gearheadE30 Long timer

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    Are you revalving as well? I think you'll still find the suspension is quite disappointing with stiff springs and mismatched damping. From personal experience, stock valving isn't even good enough for 0.59s.
    #46
  7. 2stroked

    2stroked Adventurer

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    I'm going to try it out first, need to get a baseline for me, everybody has a preference for how they want their suspension.
    The nice thing is I'm getting about 50-55mm of sag now full fuel with me on the bike, feels way different just on the road, rebound at 12 clicks and compression at 14 clicks and doesn't dive as bad goes into about ⅔ of the travel now under hard braking before it would almost bottom, also this is with the 485mm springs and mine had the 465mm springs, it was a PITA to get the cap back on the cartridge shaft.
    I'll go hammer some pot hole filled fire roads and let you know how it is. :eek1
    #47
  8. darrendeep6

    darrendeep6 BMW Dirty Dozen

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    This^

    Usually valving is good for one spring size up or down. It amazes me the number of compromised suspension set-ups people run. The stock KTM fork set-up is bad, like BMW bad :huh
    #48
  9. 2stroked

    2stroked Adventurer

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    Had a couple of rides on it, one a couple of laps on our local MX track , not as bad as I expected, if anything it made the rear feel worse, almost like not enough rebound dampning on high speed whoop type sections.
    Had to adjust the headlight lower the front sits so much higher now as well as the seat height.
    #49
  10. squadraquota

    squadraquota mostly harmless

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    If progressive springs are an option for you, contact Hyperpro.

    Had my forks set up by them last years, made a huge difference..

    You could also try companies like Traktive, Wilbers or even Reiger. They provide for just about any top Dakar team (trucks, cars and bikes).......

    And yes, 50$ odd for posting and 21% VAT makes buying in the us of ai not very attractive in many cases :nono
    #50
  11. sceep

    sceep Been here awhile

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    I had the local well known and highly recommended guru re-work my forks and shock and I am left disappointed. (i have not had a chance to take the bike back in to him yet)

    '04 950.
    240lbs in gear (290ish loaded for camping)
    rough rocky trails, fire roads, wheelies and jumps.

    He had the suspenders for 3 weeks. Claimed it took so long because Racetech had to custom make .76 springs for the front. rear spring was changed out to a 170n IIRC. valving was supposed to be done for my weight/style.

    Third day out on the new stuff and I bottomed the front end harder than I have ever bottomed anything. It was like a bomb went off. i was fully anticipating going down due to a taco'd wheel. stopped and inspected everything, all looks well other than its obvious the fork is working way to low in its stroke.

    Cranked the preload all the way up and did a few low speed "panic stops" on the concrete. I can still come within a 1/2" of bottoming, just stopping from a few MPH. This can't be right?

    Ride is harsh in the rocks. Brake dive is outtah hand.

    Planning on hitting the COBDR in July and there is no way this suspension is going to work for that. Other than take it back and talk to my guy, what ideas do you guys have to smooth this thing out and keep it from bottoming?

    Thanks.
    #51
  12. gearheadE30

    gearheadE30 Long timer

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    I'm running .64s in the front on mine, and had the forks valved on the stiff side as well, from SPS. Left the rear alone because it feels decent, though eventually I'll be raising everything some. That was enough to keep it from bottoming unless I was really going after it in the rough stuff, landing from a decent distance, or going faster than I should be through the rocks. Only bottomed it noticeably once at Moab, and I was riding with guys on 300s. I think there is something fundamentally wrong with how yours is valved then, because your springs should be head and shoulders stiffer than mine, and I still have the short travel suspension.

    If you're stuck and don't have time before you leave, I guess you could put in heavier weight oil and raise the oil some to get more stiffness just from air pressure.
    #52
  13. Torque

    Torque Been here awhile

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    I have had a few of the 990's in lately. Some for springs, some for springs and valving. Spring rates from .64 to .68 range although keeping up to .70 in stock.
    The spring is to set proper ride height and will be an improvement undoubtedly. Did .66 with no valving and got a text from owner "Thanks for the new bike" it is working awesome. Now if he is aggressive of which I believe he is then he would be taken back yet again with the revalve.
    Even though the bike with just springs installed will be more plush and take the hits better the valving will add control and safety for the aggressive riders with more precise damping.
    Springs are always first on the list for my customers regarding bang for the buck.
    If you did put in a .70 and are unhappy with the initial movement of the fork, adjust for Zero preload on the spring so you can ride in the lighter part of the spring as much as possible. Makes a difference!
    #53
  14. Parx400

    Parx400 Long timer

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    Figured I would chime in.

    I had SPS do my front first. With the stock rear the bike felt fine. Once I had the rear done a few months later I felt like the bike was not balanced correct. I dropped the spring rate in the back and still the bike felt stiffer in the rear compared to the front. Neither side was necessarily wrong but they didn't match and the front of the bike was all over the place in the loose stuff. James is redoing the front and swapping the .64's for .69's plus some valving work. I will report back on how this works.

    SPS has been awesome to deal with.

    I think the key to getting suspension correct is being clear on what you are using it for. I want mine to work is fast loose sections in the dezert. I know that means sacrificing some slow speed rocky comfort.
    #54
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  15. Justwantoride

    Justwantoride Been here awhile

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    I'm sure you guys have but I just this week increased the preload on my forks on my 990R and it has made a world of difference. The knobs were all the way CCW so I turned them 6 full turns CW and it is so much better. I don't have the front end dive any more like I did when the forks were set all the way soft. Thinking now I probably won't even get new springs. I weigh 200lbs if that matters but I'm very happy with the front suspension now. Will be testing it more this weekend on some single track.
    #55
  16. trailtrick

    trailtrick goat trail rider

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    put .59 or 62 springs ,oil level @ 110 mm 5 weight and use this stack .
    base valve
    3 24x.15
    6 24x.10
    2 22x.10
    2 20x.10
    1 18x.10
    1 16x.10
    1 14x.10
    1 12x.10
    1 10x.3

    mid valve

    2 24x.15
    1 24x.10
    1 18x.10
    1 16x.10
    1 14x.10
    adjust float at .5 mm

    add a delta shim to te rebound and a 20x.10 .
    set compresion at 16 out and rebound the same enjoy
    #56
  17. blutor

    blutor Adventurer

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    @trailtrick
    Your setting, is that for a specific fork, and is it possible to apply to my 950 2004?
    #57
  18. Peltsi

    Peltsi Adventurer

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    I wonder if any of these KTM MX/enduro bike springs would be suitable for 2006 990s fork:

    http://www.q-springs.com/suspension-springs-ktm/

    I know those are quite lightweight compared to you guys using 0.70 springs. Well I hope there's no harm asking.
    #58
  19. Rharr

    Rharr Been here awhile

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    Springs are springs, find the desired length, spring diameter (ID/OD) and rate. That's all you need. Doesn't even have be listed for a KTM bike if it matches your criteria.

    You can get Spring Diameter from the parts fiche and 210-245mm travel bikes use 465mm long springs and 265mm travel bikes use 485/88ish mm springs, or you can just use spacers on a set of 465mm springs if you find a good deal.

    Racetech, factory connection, suspensiondirect or any of the great tuners like SPS, Konflict, suspension 101 should all be able to order you springs also.
    #59
  20. trailtrick

    trailtrick goat trail rider

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    that set up is good for all years 950,990,SE .
    buy springs from CSR suspension
    use maxima 5 weight oil the one on the blue 1 liter bottle.
    skf seals and whipers.
    get you bushings from any dealer that sales stuff from parts unlimited o MTA their are like $12 each set ,kyb 48 mm
    #60