Bent forks?

Discussion in 'UK Motorcycles' started by Antony Gelberg, May 5, 2007.

  1. Yes, I said /forks/.

    Following the Hoodie Incident, I've been starting to think about a ZX-9R
    or some V-twin, e.g. SP-1. This may be costly and pointless.

    1) I live and mostly ride in London. There goes the SP-1 (maybe). My
    wrists hurt enough anyway from RSI etc.
    2) I'm a decent rider, in terms of riding within my limits, but I reckon
    like a lot of people who don't get out of town much, my limits are way
    too low.

    This means what I should do is as TOG and others suggested and plan to
    buy my bike back from the insurers when they write it off. Then fix it,
    and do some track days. That's got to be better VFM than upgrading
    bike. Then when I feel that I'm reaching the limits of the Cat
    (possibly never), get all Billy Big Balls and upgrade.

    Anyway, to the point. I'm trying to work out if the frame and / or
    forks are bent, so I'll be prepared for the insurance assessor to try
    and lie. They dropped it at slow speed (they hadn't even started it).
    What's the chances of bending frame and or / forks at walking pace?

    Only clue I have at the moment is that when the bars are pointing
    straight, with bike stationery, there is noticeable resistance towards a
    right-turn compared to how it used to feel. I also /think/ that full
    left-lock is not as much turn as it was before, although I could be
    making that up. I'll go and check and report back if I'm talking bollocks.

    I definitely notice a bend in the right handlebar - suppose this was
    from breaking the steering lock. C***s.

    Antony
     
    Antony Gelberg, May 5, 2007
    #1
    1. Advertisements

  2. Antony Gelberg

    Lozzo Guest

    Antony Gelberg says...

    Do yourself a big favour and don't ride it until you've had it checked
    by a professional. There may still be broken parts of the steering lock
    mechanism lurking in the headstock area ready to break free and lock the
    steering as you ride.


    --
    Lozzo
    Triumph Daytona 955i SE (Black with added black bits)
    Suzuki GSX-R750L trackbike (Shite with added shite bits)
    Yamaha SR250 Cheasy-Rider (undergoing a transformation)
    I ride way too fast to worry about cholestorol.
     
    Lozzo, May 5, 2007
    #2
    1. Advertisements

  3. Antony Gelberg

    Krusty Guest

    Forks - zero. Frame - possibly a kink if it fell dead weight on a small
    pointy object.
    The forks may be twisted in the clamps - very common if the end of the
    handlebars whacks the floor. You can normally un-twist them by sitting
    on the bike & banging the front of the wheel against something solid by
    yanking the bars.
    That may also have twisted the forks.

    --
    Krusty
    www.MuddyStuff.co.uk
    Off-Road Classifieds

    '02 MV Senna '03 Tigtona 955i '96 Tiger '79 Fantic Hiro 250
     
    Krusty, May 6, 2007
    #3
  4. Antony Gelberg

    muddy cat Guest

    Christ, that'd be fun, eh?
     
    muddy cat, May 6, 2007
    #4
  5. Antony Gelberg

    Lozzo Guest

    muddy cat says...
    It happened to a mate of mine, he discovered what caused the accident
    just after the plaster cast came off his arm.

    --
    Lozzo
    Triumph Daytona 955i SE (Black with added black bits)
    Suzuki GSX-R750L trackbike (Shite with added shite bits)
    Yamaha SR250 Cheasy-Rider (undergoing a transformation)
    I ride way too fast to worry about cholestorol.
     
    Lozzo, May 6, 2007
    #5
  6. Antony Gelberg

    muddy cat Guest

    I thought it had a ring of personal experience to it.
     
    muddy cat, May 6, 2007
    #6
  7. Antony Gelberg

    Beav Guest

    I've never had it happen on a bike, but I've had it happen on a car.
    Fortunately I knew the lock had been giving trouble, so it was being pushed
    into the garage for fettling when we found out it would simply stop
    steering. Since then I've been of the mind that a steering lock on a bike is
    actually a fucking mad idea.


    --
    Beav

    VN 750
    Zed 1000
    OMF# 19
     
    Beav, May 6, 2007
    #7
  8. How do steering locks actually work? Is the mechanism visible without
    taking bits off the bike? I'll get it looked at, for sure, but I'm
    vaguely competent with cage mechanics - how hard can this be? ;)
     
    Antony Gelberg, May 6, 2007
    #8
  9. Antony Gelberg

    Keith G Guest


    What is all this? If the forks are twisted all you do is loosen the
    'yolk bolts' (?), twist 'em back again and tighten up the bolts. If the
    forks are *bent* you need professional help to get them straightened or
    new forks....
     
    Keith G, May 6, 2007
    #9
  10. Antony Gelberg

    Krusty Guest

    Yes, we know. My reply about them possibly being twisted was in
    response to the OP saying that "full left-lock is not as much turn as
    it was before", which is more likely to be twisted rather than bent
    forks, given the speed of the drop. As twisted forks also mean the
    clamps are out of alignment, the bottom clamp may be hitting the
    lock-stop before the top clamp (& hence the bars) go as far round as
    normal.

    --
    Krusty
    www.MuddyStuff.co.uk
    Off-Road Classifieds

    '02 MV Senna '03 Tigtona 955i '96 Tiger '79 Fantic Hiro 250
     
    Krusty, May 6, 2007
    #10
  11. Yoke, FFS.
     
    The Older Gentleman, May 6, 2007
    #11
  12. Antony Gelberg

    Keith G Guest

    in message

    Where do you want the banana sending...??
     
    Keith G, May 6, 2007
    #12
  13. Antony Gelberg

    Lozzo Guest

    Antony Gelberg says...
    On your Thundercat there's a mechanism under the ignition switch that
    pushes out a rod approx 10mm dia as you turn the key - that rod engages
    into a recess in the headstock when the bars are turned fully left. If
    the steering lock has been forced the rod may be in a position where it
    can catch and lock the steering wherever the bars may be.

    Get a pro to have a look, because unless you can drill out and remove
    shear bolts you won't be able to remove the ignition switch from the top
    yoke. Pattern ignition switches are available for the Thundercat for
    about half the cost of a new Yamaha one. Bickers and Hi-Level supply
    them to the trade.

    --
    Lozzo
    Triumph Daytona 955i SE (Black with added black bits)
    Suzuki GSX-R750L trackbike (Shite with added shite bits)
    Yamaha SR250 Cheasy-Rider (undergoing a transformation)
    I ride way too fast to worry about cholestorol.
     
    Lozzo, May 6, 2007
    #13
  14. Antony Gelberg

    Timo Geusch Guest

    Don't over-egg it.
     
    Timo Geusch, May 6, 2007
    #14
  15. Antony Gelberg

    ogden Guest

    Having just removed the ignition barrel from my 7R, I can confirm that
    Sweller's chisel and screwdriver technique works a treat, no drilling
    required, and only takes about 15 minutes with some earplugs and a 2
    quid cold chisel from B&Q. And I mean it about the earplugs.
     
    ogden, May 7, 2007
    #15
  16. Care to elaborate?
     
    Antony Gelberg, May 7, 2007
    #16
  17. Antony Gelberg

    ogden Guest

    Lump hammer -> Cold chisel -> Metal shear bolt = fucking loud clang.

    Or did you mean the method? In which case, remove the top yoke and you
    should see the remains of the shear bolt shafts. Get a small chisel (I
    used cold, sweller suggested wood) and make a slot in the shaft. You may
    need to go down as far as you can, but then pop a flathead screwdriver
    into the slot and turn to undo the bolts.

    No drilling required, but if it doesn't work, you still have the rest to
    drill out.
     
    ogden, May 7, 2007
    #17
  18. Antony Gelberg

    dog Guest

    sportsbikes in london are a total nightmare due to the large number of
    thieve-to-order organisations. consider something like a firestorm?
     
    dog, May 8, 2007
    #18
  19. Indeed, but I'm trying to not use this episode as a reason to waste more
    money, and I'll fix the Cat if I can (or rather Lozzo will). I think
    SP1s and any VTR-1000 for that matter look like value, but I also reckon
    if I got one, I'd rapidly get pissed off with the fuel consumption,
    range, tyre wear etc. Also, as I said, I'm not even good enough to get
    the most out of the Cat yet. So I don't want one.

    But, er, I /do/ want one. I've never ridden a V-twin but I reckon I'd
    get on with the sound and the delivery, although admittedly in town any
    machine has enough low-down power. Even a Fiat Panda.

    Must... resist... urge... to... buy... impractical... loud... fun...
    motorcycle...
     
    Antony Gelberg, May 8, 2007
    #19
  20. Antony Gelberg

    dog Guest

    ykims
     
    dog, May 8, 2007
    #20
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.