Fitting an off-road suspension on a sportbike?

Discussion in 'Some Assembly Required' started by Broody, May 29, 2018.

  1. Broody

    Broody Adventurer

    Joined:
    Jul 22, 2017
    Oddometer:
    20
    Hi,

    I have an old FZR250 with a saggy suspension and can't source any decent shock at a reasonable price or rebuild the oem unit. Since the bike is retired and worthless I thought it would be fun to fit an offroad suspension on it. Is this something doable?

    I guess that a front end swap would be required, which isn't too hard to find, but is it quite easy to match the donor triple tree on the receiver? What is typically needed aside from custom bearings?

    What about the rear? If I get let's say a xt350 monoshock (similar "eye" holes to bolt it to the frame) and make custom dogbones for the proper ride height, would that work? Or it would be a nightmare to get the geometry right?

    And my fzr is an older model with the steel frame, about 140kg dry. Fitted with motocross suspension, would the frame handle dirt and bumps (no jumps) just fine?

    I tried to find similar builds but couldn't find any except a monster, so I guess it's not a great idea or too much hassle?

    Any insight would be appreciated, thank you.
    #1
  2. Richarde1605

    Richarde1605 Been here awhile

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    Jan 1, 2015
    Oddometer:
    844
    Location:
    NSW Australia
    I say go for it, you are in the best position to find out!
    My only advice would be to make sure that at full compression nothing fouls.
    I have a mate that builds all kind of things, just got to suck it and see...

    Sent from my SM-G950F using Tapatalk
    #2
  3. Broody

    Broody Adventurer

    Joined:
    Jul 22, 2017
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    Actually the more I read, the more I think it's a bad idea. Fitting the triple tree from the donor bike and figuring out what I need for the stem, head bearings and all is more than I can do.

    Nothing would fit the original triple.
    #3
  4. Pezz_gs

    Pezz_gs Cant ride for crap

    Joined:
    Nov 13, 2004
    Oddometer:
    4,659
    Location:
    Sydney Skunkworks
    Built by Charley for our Scrapheap Adventure Ride and he fitted TM250 suspension front and rear.

    [​IMG]

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    #4
  5. Richarde1605

    Richarde1605 Been here awhile

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    Jan 1, 2015
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    Location:
    NSW Australia
    Great work, no fizzer there, except perhaps the sidestand extension :-)

    Sent from my SM-G950F using Tapatalk
    #5
  6. Broody

    Broody Adventurer

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    Jul 22, 2017
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    Great work! How does it handle? Lots of custom fab?
    #6
  7. sdbryan

    sdbryan Adventurer

    Joined:
    May 24, 2018
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    18
    Location:
    San Diego, CA
    #7