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Front Suspension Upgrade - FZR

Discussion in 'Yamaha 250cc In-Line 4's' started by GreyImport, Jan 4, 2014.

  1. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Ruckus or any ZXR250 owner,
    Can you let us know the specs of the 250 forks whilst doing your research.
    1/ Outer tube diameter(s) - some have different diameter from the top crown to the bottom crown.
    2/ Stanchion diameter.
    3/ Length - top to axle centre
    4/ brake calliper bolts centre to centre
    5/ Front disc diameter
    6/ Fork crown offset
    thanks in advance for any info
    cheers
    Blair
     
  2. Revolver

    Revolver Big Member

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    Any movement on this? Getting tired of my front end diving......
     
  3. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Suzuki GSX250 *Triumph Bonneville 750 T140V *Triumph Daytona 675
    Yea Im with u there ......... we are going to get some 400 springs for the Grasshopper 3LN3 to see how they go ...... but the $$$ are a bit short ATM so not sure when it will happen.
    But we will start with heavier fork oil and see wat happens from there as that needs replacing anyway.
     
  4. ruckusman

    ruckusman Well-Known Member Premium Member Dirty Wheel Club

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    I was hoping to rouse some interest in splitting shipping costs on fork valve emulators but got no takers...the shipping was coming in at about 100% over the actual item cost

    I'm still interested though...
     
  5. Revolver

    Revolver Big Member

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    Silly question......

    Can't we replace the forks with another bikes set? On the old FZR250 site, I believe it was an FZR 1000 a guy was building and used a set of R1 forks? Can we not do that? I've seen a couple of bike builds that use this. Upside down forks seem to be a favorite as well.

    Find a bike with similar fork length? Especially if it's for a bike that is popular, parts and so will be easier to source to change spring rates, etc.
     
  6. Th3_Huntsman

    Th3_Huntsman Senior Member Premium Member Contributing Member

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    Zxr250 usd forks are a popular change. As they are the most adjustable out of the inline 4 screamers forks.
     
  7. Tim_

    Tim_ resident nutcase Premium Member Dirty Wheel Club Contributing Member

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    I don't see why not... I have been told on here that MC22 owners use the ZXR USD forks and that conversion works..
     
  8. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    True, I sold a few sets of zxr forks to fzr owners
     
  9. Tim_

    Tim_ resident nutcase Premium Member Dirty Wheel Club Contributing Member

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    I still think your cibby would look good with USD forks..
     
  10. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    FZR forks are very basic especially compared to the USD ZXRs which have multiple adjustments.

    Id prefer to put the effort into putting the R6R rear shock in and just taking out some of the 'dive' under braking in the front end with minimal effort and cost.
     
  11. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Me too mate .... when I can afford it! :)

    Id like to put them in both the Fizzers here
     
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  12. mboddy

    mboddy Well-Known Member Premium Member Contributing Member

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    I fitted FZR250 3LN forks with YSS PD Emulators to my R1-Z 250.
    The slightly heavier spring rate suited the lighter 2 stroke with me onboard.
    Whatever forks you have you still need to set then up to get the best from them.
     
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  13. architect

    architect Active Member

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    Canadian here. Not sure I can get in with this group buy but I'd be sorta interested if we're talking about 175 CND for some 250 springs ;)
     
  14. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    The previous posts are quite old. As I posted in this thread, check with your local spring factory first.
     
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