xr650r shock Horror!

Discussion in 'Thumpers' started by Walnutwhip, Nov 10, 2007.

  1. Walnutwhip

    Walnutwhip Adventurer

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    hi, recently purchased my xr650r (after reading loads on adv) and have been astounded by the performance of the bike and cant believe why i have not had one sooner guess things move slower here in uk:wink: this is after a brief encounter with a yam xt600e good little bike but totally lacking in the suspension and power. In my efforts to ds my ride and improve suspension i recently bought a eibach lowering spring and is said to be 12kg this was bought off flea bay and came with a doughnut type soft shim? anyway my fears are that this spring is for a xr650l not r model it is 25mm shorter in length will this fit the 650r? have a feeling i should not have jumped at this bargain! :ear
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  2. peru

    peru Adventurer

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  3. Walnutwhip

    Walnutwhip Adventurer

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    Thought someone would have an idea here guess they dont know much about the xr650r :evil
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  4. pburke

    pburke Talks more than he rides

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    I have never heard of a lowering spring for an XR650R. Probably meant for the L
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  5. Ruffus

    Ruffus Dirty Old Mudder

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    give it a couple days, it's the weekend, people are out riding, or doing other things in their life. very few here actually live on the cyber info highway
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  6. NC Rick

    NC Rick Cogent Dynamics Inc

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    You do not want to lower your bike using a spring.

    What you can do is put a shorter spring on the shock and shorten the stroke internally on the shock. Often there will be enough preload adjustment to allow for some lowering in this manner using the standard spring. Be careful lowering any bike, you have to be sure that there is still enough fender clearance and ground clearance, Internally limiting the stroke of both the shock and the forks is the only way that I consider acceptable.

    Rick
    motocd.com
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  7. husky123

    husky123 Long timer

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  8. Walnutwhip

    Walnutwhip Adventurer

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    Quite sure over the years that you can buy lowering springs i have one on my honda cr265 fitted by the previous owner the spring on the xr650 is bouncing all the time when on tarmac but is almost unoticed offroad have tried winding the preload adjusters down still too soft but feel this could have an adverse effect on progression? The spring i have here is eibach 03/98 0800 250.0700 and is 25mm shorter than standard just need to check if it will fit 650r the item supplied with it is probably for revalving? :ear
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  9. scooteraug02

    scooteraug02 Dog Rancher

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    I don't understand your goal with the spring.

    Are you trying to lower the bike? If so the kouba link is the way to go.

    Your new spring is an inch shorter, so you are using an inch/25mm of threads just to put tension on the shock, then what?

    If it is bouncing around you need to adjust the rebound or compression.

    Thumper talk has a suspension and a XR650R section.

    TT Suspension

    TT XR650R

    Hope this helps.
    #9
  10. Walnutwhip

    Walnutwhip Adventurer

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    The spring is 12kg as opposed to 9kg which i think is standard fitment on the xr650r by fitting this 12kg eibach which is 25mm shorter will stiffen and lower suspension the problem is this item may be for xr650l will it fit the r thats the question :ear
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  11. Luke

    Luke GPoET&P

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    Eibach makes a bunch of springs. What is the part number on yours? The XR650L takes a 08890120 , the XR650R takes a 08885120.

    Checking the spring rate chart, it looks like a 12kg/mm spring is appropriate for a 300# rider.

    You can lower the bike by reducing the preload, but a stiffer spring won't help you there. In order to get a significant amount of lowering, you will need to modify the shock internally. A shorter spring will help you there, but it will do nothing without these internal mods. IMO, this is a better way to lower the bike than using a lowering link. It's a lot more trouble, though.
    #11
  12. sstodvictory

    sstodvictory Been here awhile

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    What is your goal, stiffening or lowering? To stiffen my XR650R I went with an Eibach 10.5 Kg spring - Eibach 885.0105.1.

    Steve
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  13. Ben10

    Ben10 Expert Trespasser

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    Just look on the Eiback website. It lists the part number and dimensions of each spring. Then look up the spring you currently have either by the number painted on the spring (typically) or by the dimensions. For what its worth I didn't see a "lowering" spring advertised on the website. If you don't have the correct spring get rid of it. I dont think that dirtbikes are designed to be lowered by the installation of a shorter spring. The swingarm/linkage leverage ratio is designed to provide a specific amount of rising rate dampning throughout the full shock stroke. (i.e. suspension gets stiffer as it goes through its stroke) A shorter spring makes the bike lower but screws up your rear suspension action... plus it's just ghetto. While we are on the subject running your preload rings down a couple inches has the exact same effect on your suspension as a shorter spring. Lowering links are the only real way to lower a bike and maintain proper suspension action. Not to mention that I saw it on Mythbusters so it has to be true.
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  14. QUICKSILVER

    QUICKSILVER Native Arizonan

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    I completely agree. I bought a new "L" and invested about a month learning all I could about suspension geometry and related info to lower the thing and preserve the original suspension. The use of an alternative spring is asking for trouble. An "R" is a wonderfully profesionally designed machine and to alter the pre-load, spring rate, or dampening to affect a change in height is not a good idea (IMO). If you send me a PM I will forward all my notes about this issue (lowering the bike) happily.
    A lowering Link is really the only method worth looking at from a suspention perspective. There are really only two companies that produce a very high quality part that will proform to a level worthy of the bike:
    http://www.koubalink.com/
    http://www.performance-design.net/

    The use of an alternative spring will create a "domino effect" on other aspects of the suspention and ride feel......just my opinion.
    #14
  15. Walnutwhip

    Walnutwhip Adventurer

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    The intensions were to lower and stiffen the rear shock with the 12kg spring and no im not 300 lbs the spring was "bigger" kg to allow carrying ds stuff. In relation to LUKE and NC RICK it is possible to fit lowering spring and at the same time stiffen progression with a heavier spring but means carrying out internal work on shock hence the doughnut type shim that came with the spring. Anyway the spring no is 0800250700 as mentioned earlier and does not seem to relate to xrr or xrl what the fook is it for so i can get rid of it!
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  16. scooteraug02

    scooteraug02 Dog Rancher

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    [​IMG]

    This lowers the bike 1.5 inches. Costs $150.00

    Kuoalink Disclaimer: Lowering the rear more than the front can change the geometry and could affect the handling, so be careful out there.
    #16
  17. Max Power

    Max Power Secret Agent

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    :scratch

    Are you PUI?
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  18. Luke

    Luke GPoET&P

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    It sounds like what he's got is rebuild parts that shortens the shock. If the spring is for the right shock (dimensions should be 59mm ID on one end, 63mm ID on the other, and 217mm or less in length) then what you do is install the spacer on the shock rod, attach the new spring, and you've got a shorter shock.

    A bit difficult to install, but a way better solution than a lowering link. The LLs pretty much eliminate the progression of the linkage so you bottom out more easily. They also don't allow the shock to fully compress so your fender becomes the bottom-out stop.
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  19. Walnutwhip

    Walnutwhip Adventurer

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    I can understand the guys going on about the koubalink but it wont help stiffening suspension it would need kouba + spring = expensive.
    Thanks Luke really good information yep it looks like a shock rebuild kit unfortunately does not resemble the dimensions that you gave as is equal diameter at top as bottom. Looks like 650 L eiback 12kg spring bought in error flee bay here you go!

    What is puI by the way? :huh
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  20. Luke

    Luke GPoET&P

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    No, I got it backwards. The 59x63x217mm spring is for the XR650L (and the other air cooled XRs) The XR650R uses a spring that is 62x56x247mm (longer and skinnier but also tapered) and tends to have lower rates. See the eibach page. You should measure the spring, when I look at it I can't see the difference in diameters, and it almost fits backwards on the shock.

    PUI= Posting Under Influence
    #20