Suspension question

Discussion in 'Motorcycle Racing' started by Kevin Arouza, Jun 25, 2004.

  1. Kevin Arouza

    Kevin Arouza Guest

    I recently had my forks revalved/resprung by a renowned tuner here in
    SoCal who recommended .90 straight rate springs and 5wt oil. I weigh
    around 135-140 lbs w/o gear. The bike is a 2002 CBR600 F4i.

    Now, I am trying to set the correct amount of rider sag but with the
    preload backed all the way out I am only able to achieve a maximum of
    30mm. Does this mean that the spring is too stiff. The front end
    feels pretty good to me but I hear the ideal sag should be around
    32-34mm. Opinions?
    Kevin Arouza, Jun 25, 2004
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  2. Kevin Arouza

    Peter Snell Guest

    Sounds like the internal spacer is a little long. Talk to the renowned
    tuner, and if he's the sort that stands behind his work he'll fix you
    right up. Be sure that you are measuring the sag correctly first. The
    32-37mm figure should be from unloaded, fully extended, to both wheels
    on level ground, fully attired rider aboard in riding position. You need
    at least one person to help and the sort of stand that 'hangs' the front
    to measure this effectively. Or two big friends to hoist the front by
    the handlebars for the extended measurement.


    Pete Snell
    Royal Military College
    Kingston Ontario

    The reasonable man adapts himself to the world;
    the unreasonable one persists in trying to adapt the world to himself.
    Therefore all progress depends on the unreasonable man.
    - George Bernard Shaw
    Peter Snell, Jun 25, 2004
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  3. Kevin Arouza

    Kevin Arouza Guest

    thanks for the info Pete :)

    Kevin Arouza, Jul 8, 2004
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