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Thread: Back wheel a bit wriggly

  1. #1
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    28th August 2005 - 18:21
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    Back wheel a bit wriggly

    OK, so it's not really a sportsbike but I'm just getting to the point of learning where I'm starting to push my bike a bit round corners. It's a 2003 SR250, so not really designed for stellar performance.

    Anyway, from time to time I've noticed the back wheel getting a bit wriggly or generally feeling unsettled. Generally coming out of a corner and "hard" on the gas although I had an interesting one leaving a wet roundabout the other day.

    Before this finally lands my arse on the tarmac, can anyone shed light on why? Is it:

    a) My technique sucks? If so, in what way - probably?
    b) The first signs of the back tyre being worn? The bike has about 11k on the clock but I doubt the tyre has ever been changed.
    c) More preload? Less preload? Makes no difference?
    d) F'ks sake it's a beginners 250, don't cane it that hard.

    All pointers gratefully received. Oh, and a discussion on the difference between good suspension and bad would be enlightening. Why, for instance, do people pay so much for Ohlins shocks?

    Cheers,
    Dave

  2. #2
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    15th February 2003 - 10:49
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    Good tyres will make the bike handel heaps better. Also tyre pressures etc...

    There are quite a few things before you go the way of suspension (especially on such a new bike) and things like wheel bearings and such..

    Why do people buy ohlins.. cause it further improves the handeling of your bike and it can be finley tuned for a specific rider. It will just do everything better than the origional.
    Lump lingered last in line for brains,
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  3. #3
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    23rd April 2004 - 19:16
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    got any pics of it? Last i heard an SR250 was a rat bike like the GN...
    KiwiBitcher
    where opinion holds more weight than fact.

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  4. #4
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    23rd August 2005 - 18:38
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    Quote Originally Posted by RantyDave
    ...Before this finally lands my arse on the tarmac, can anyone shed light on why?...
    There is room to move by changing shocks and playing with the settings but I would recommend you, at least, start from the base up and work from there. Just changing the tyre make can make a huge difference but at the end of the day, tyre pressures are still a BIG part. If you havent got a guage then get one and monitor them. Start at the manufacturers recommendation and work on them until it suits YOU. For example, I run 39psi in the front even though the tire manufacturer recommends 42 .. All to their own personal taste...
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  5. #5
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    28th August 2005 - 18:21
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    Quote Originally Posted by gareth_d
    got any pics of it? Last i heard an SR250 was a rat bike like the GN...
    A bit like a GN. I actually quite like the "not being a GN" aspect of the whole thing, although whether it's me just be an insufferable snob or not remains to be seen.

    Attached...
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  6. #6
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    28th August 2005 - 18:21
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    Quote Originally Posted by hayabusa01
    If you havent got a guage then get one and monitor them. Start at the manufacturers recommendation and work on them until it suits YOU.
    Ahhh, right. I took a while for me to organise a guage but when I did I realised the bike came from the shop with 300kPa (~43PSI) and Yamaha's service manual recommended 180 front and 200 rear (~28PSI). So I dropped the pressure. I did notice a reduction in "bounce" off the rear wheel under engine breaking but have been wondering if I over cooked it a bit.

    I'm kinda light too, I think. A reasonably skinny just under 6 foot, but starting to get inevitable 30-something lard

    I shall piss around with tyre pressures and see what happens.

    Dave

  7. #7
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    1st September 2004 - 12:38
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    Check your rear wheel bearings. Worn bearings means a wobbly back wheel, which will result in a vague feeling that you can't quite puit your finger on. Make sure you check the wheel in several different positions.
    My daughter telling me like it is:
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  8. #8
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    22nd April 2004 - 15:31
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    Doesn't it have a quite a square shape tyre? You probably find there isn't much rubber on the road with any lean so that may cause problems, but I think that's a bit how they come.

    We were out riding my mates GN in the wet yesturday and it was doing that a bit as well. So could be part bike style/tyre shape.
    Life is difficult because it is non-linear.

  9. #9
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    17th July 2005 - 22:28
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    my gn did that too, i raced my brothers cage over the takas [i stayed behind him as his mazda 323 1300 was more powerful and he knows the road better] and he said it was doing wobblies out of corners and i didnt even notice, i only went 'fast' up the hill and them some fellas over took us on some real bikes, though when i rode my bros 650 home he didnt stand a friggin chance :spudwave: [ my brother not the real bikes, they woulda eaten me] sorry, i'm ranting, but yeah thats what gns do when trying to corner leaning off the bike pretending to knee down etc [in short we ride crappy bikes like that waaaaaay to hard ]
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




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