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Olivier Biron

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About Olivier Biron

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  1. Olivier Biron

    Shortening/cutting front fork springs

    That’s actually my real name. For some reason TT changed my screen name for my real name at some point.
  2. Olivier Biron

    Shortening/cutting front fork springs

    The metal bar analogy is in 2 dimensions, but all a coil spring is is a 3 dimensional inclined bar. Imagine an inclined bar, fixed in its lower extremity, with a horizontal component X and a vertical component Y. It is twisted following a horizontal pattern (with a fixed radius equal to 1/2 coil diameter) while keeping the angle and Y dimension constant. You would end up with a coiled metal bar that acts as a 3-dimensional equivalent to the straight piece of metal. The length of the spring is equal to the Y dimension (vertical) of the bar, and the number of coils is relative to the X dimension (horizontal). Obviously, the longer the bar, the more coils it will have when twisted. But also, the longer it is, the more leverage you have to bend it, making it a softer rate. Now imagine you shorten the straight bar it its Y axis without changing its angle (which is the same as cutting a coil spring), you shorten the bar, which means less leverage, and stiffer rate. Of course, all this is assuming the load is applied along the Y axis, so the leverage is measured along the X axis. I hope my explanations are clear, let me know if you need more clarifications.
  3. Olivier Biron

    Shortening/cutting front fork springs

    That's just an autocorrect. I think he meant "give me a decade or two..."
  4. Olivier Biron

    2018 YZ65

    That’s a TTR50
  5. Olivier Biron

    Cleaning titanium headpipe

    Scotch brite and WD40, scrub gently.
  6. Olivier Biron

    New Forks

    I'd contact Technical Touch, they're the official KYB distributors. I'm sure they could get you what you need for cheaper than through an OEM.
  7. I can feel a 1mm change in fork height. Of course, the difference is not night and day, but can still be felt. I agree on having to check sag when changing fork height.
  8. Olivier Biron

    Anyone get their '18 YZ450 yet?

    Yes they do. Matter of fact I used a set of wheels off a 14 on my 18 this week.
  9. Olivier Biron

    Fork Travel

    I would suggest you start with preload/sag to get the ride height and balance before working the clickers. Also, for the shock, start with the rebound as it also affects compression. Once you have your rebound close to where you want it, you can fine tune the compression.
  10. Olivier Biron

    Forks firm on down hills

    This. When it comes to bushes and seals, the more expensive options often end up being the cheapest solution in the long run.
  11. Olivier Biron

    Who is running a Rebound Separator Valve?

    Try exxtrememx.com
  12. Olivier Biron

    2015 YZ250 Forks on Stiff side

    Doesn't matter. I'd swap out the right one simply because the fork can be taken out faster (no brake line and caliper to take off)
  13. Olivier Biron

    2015 YZ250 Forks on Stiff side

    For the what's and how's I suggest you get Race Tech's suspension bible. Lots of info in it.
  14. Olivier Biron

    2015 YZ250 Forks on Stiff side

    I remember having similar discussions last year about your 450. You ask for help, then argue with anyone trying to offer advice. If you want to reject the consensus, then you're pretty much on your own...
  15. Olivier Biron

    2015 YZ250 Forks on Stiff side

    You complain about them being too soft and mushy, yet you're trying to find a way to make them softer... I still think you would make them feel softer if you went harder on comp damping. And get the right springs for your weight, with proper preload.
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