1. 4 Stroke Husqvarna Motorcycles Made In Austria - About 2014 & Newer
    FE = 4st Enduro & FC = 4st Cross

FE/FC Blue disc guards and more.

Discussion in '4st' started by Colo moto, Apr 29, 2016.

  1. Colo moto CH Sponsor

    Location:
    La Jara, Colorado
    Husqvarna Motorcycle:
    7602racing.com
  2. LandofMotards Moderator

    Location:
    Colorado
    Husqvarna Motorcycle:
    2014 TC250
  3. Colo moto CH Sponsor

    Location:
    La Jara, Colorado
    Husqvarna Motorcycle:
    7602racing.com
    These disc guards are also available in grey. Or orange if you're that type of guy. :D Price for front or rear is $104.95. Axle nuts are available in blue or orange. $22.49
    LandofMotards likes this.
  4. JonXX Administrator

    Location:
    Bill's Motorcycles Plus
    Husqvarna Motorcycle:
    360CR 360WR SM610 TC450 TXC250 TC250
    Other Motorcycles:
    Hondas, Harleys, Yammys & a squid
    I just got mine put on my new bike the other night, they're awesome!
  5. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    None
    Other Motorcycles:
    2018 Gasgas XC250
    I've always wondered wat stops the front guard from rotatin due to impact n hittin caliper?
  6. JonXX Administrator

    Location:
    Bill's Motorcycles Plus
    Husqvarna Motorcycle:
    360CR 360WR SM610 TC450 TXC250 TC250
    Other Motorcycles:
    Hondas, Harleys, Yammys & a squid
    A couple of different ways. First, as you can see, the guard rests against the caliper mount on the fork leg. Second, the guard is clamped in place (in terms of rotation around the axle) between the forks by the properly-torqued axle nut. Once installation is complete, it's very difficult (but not impossible) to rotate the guard.

    This benefits us and (counterintuitively) helps prevent breaking the caliper mounts off of the fork by the transference of force in a couple of ways: First, the impact force to the guard is transferred largely to the axle, which is of course cushioned by both forks' travel action. This absorbs the majority of the impact force. Second, because the guard rests against the caliper mount and is clamped firmly to the lower fork leg, the guard effectively increases the area of the caliper mount and absorbs and transfers the impact force rather than it being concentrated in that one small area where the mount meets the lower leg. If the guard is not resting against the caliper mount, a lot of force will be transferred to the forks via the axle, but the guard then has the opportunity to swing around and act as a trip hammer against the caliper mount, concentrating force onto a small area.

    To illustrate, imagine taking an 8 pound drilling hammer and swinging it as hard as you can and hitting the caliper mount. Pretty sketchy, huh. Now imagine taking that hammer and hitting the installed guard as hard as you can. Sure, if you hit it in just the right spot you *might* bend or even break it - but the majority of the hit will be transferred directly to, and absorbed by both forks.

    So it's important that the guard be resting against the caliper mount when you install it :)
  7. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    None
    Other Motorcycles:
    2018 Gasgas XC250
    That's a very in depth n physics based reply. Cheers Jon.:)

    Makes sense I guess beats a bent disc n snapped caliper mount. I had an Acerbis spider plastic guard on my 300 for a while n yeah it clamped up tight with the axle nut/fork lugs. Always kept it just off caliper but being plastic it wasn't really an issue. Never moved. Jus thought the ally guards being ridgid would move easier but your explanation makes sense(resting on caliper n dispersing force)