a question from long ago answered

Discussion in 'UK Motorcycles' started by jsp, Mar 1, 2008.

  1. jsp

    jsp Guest

    a few months ago I asked what might cause the bars to wobble when you let go
    of them.

    I can tell youthe answer now. A bent swing arm.

    I bought a Fazer, which had the problem mentioned. One wet day I braked
    slightly hard at 20mph in a straight line and found myself on the floor.
    The bike was written off. The most expensive repair identified was a bent
    swing arm. There's no way I bent it in the spill, but it would explain the
    wobble and also falling off in a straight line at 20 mph.

    So, if the bars wobble when you let go, there's one thing to check, at

    jsp, Mar 1, 2008
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  2. jsp

    Hog Guest

    " "
    Hog, Mar 1, 2008
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  3. jsp

    Lozzo Guest

    Is this the same guy with a Fazer that Statto and I followed from the
    Black Horse at Hulland Ward through the back lanes to Matlock Bath, in
    which case your swingarm wasn't bent enough to stop you riding very
    swiftly and in perfect control on that occasion.
    Lozzo, Mar 2, 2008
  4. jsp

    jsp Guest

    No, the last time we met was at the ESOM three years ago, and at that time I
    had a balck SV650. Before that it was gliding in Dunstable. I only had the
    Fazer for 6 months or so...

    As for the swing arm, no it wasn't bad enough to stop me going swiftly,
    although I always had the feeling that a Fazer should handle better than it

    jsp, Mar 2, 2008
  5. jsp

    Lozzo Guest

    They're shit bikes.
    Lozzo, Mar 2, 2008
  6. jsp

    Dave Emerson Guest

    It depends how you aligned the rear wheel.

    Did you trust the chain adjuster markings or check with a straight-edge or
    even by sighting down the rims?

    Few bikes have accurate adjuster markings, even if their s/arms aren't bent,
    and this can result in head shakes and other strange effects as your
    "single-track vehicle" becomes an off-set track vehicle.
    Dave Emerson, Mar 2, 2008
  7. jsp

    boots Guest

    On Sat, 01 Mar 2008 22:41:53 GMT in uk.rec.motorcycles, jsp says:

    When mine went through a stage of doing that it was a fucked front
    tyre. Started cracking along the side where the tread was cut. I got a
    refund from Bridgestone.
    boots, Mar 2, 2008
  8. jsp

    Pip Luscher Guest

    My Guzzi *used* to do this when the front tyre had less than a couple
    of thousand miles on it and was just a couple of pounds over pressure,
    especially if the back tyre was at the lower end of its recommended
    pressure range. I didn't need to let go of the bars to experience it,

    It hasn't done it since the last front tyre change. Purely out of
    curiosity, I tried playing with the pressures to see if I could
    reproduce the effect but to no avail, so something's definitely
    changed. Possibly Pirelli have changed the tyre design, or maybe the
    suspension has sagged with age or it's a result of me dicking with it.

    The one time I rode a bike with a twisted swingarm, to the extent that
    the wheels were visibly out of line when sighted from the front, it
    simply tended to roll left when the bars were released; there weren't
    any wobbles.

    Similarly, a misaligned rear wheel on another bike simply caused it to
    want to roll in one direction when the bars were released.
    Pip Luscher, Mar 2, 2008
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