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slight lateral movement rear wheel

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sutty86
Trackday Trickster



Joined: 30 Jan 2015
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PostPosted: 08:29 - 17 Jul 2015    Post subject: slight lateral movement rear wheel Reply with quote

any one know any remedys for this,only a mm or two just have mot coming up.
thanks
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stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
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PostPosted: 08:36 - 17 Jul 2015    Post subject: Reply with quote

You need to fix the reason why.

If the nut is done up tight, the most likely culprit is failed wheel bearings which would need replacing with a degree of urgency wether the MOT is due soon or not.

"Only a mm or two" is a dangerous way to think. There should be NO lateral play on either wheel at any time, any evidence of such play is your cue to get it sorted.
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Taught2BCauti...
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PostPosted: 08:37 - 17 Jul 2015    Post subject: Reply with quote

Hard to say without knowing make/model/year, but generally a sign that you need to inspect the rear wheel bearings immediately, and change them if they are worn.

Could be a cheap and easy DIY job, or an expensive dealer only job.
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sutty86
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Joined: 30 Jan 2015
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PostPosted: 08:42 - 17 Jul 2015    Post subject: Reply with quote

sorry its a derbi terra 125 , i have some wheel bearings here i bought a while bike for future use,
presume its a hard job, got a few tools but not exactly an expert!
cheers guys
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MarJay
But it's British!



Joined: 15 Sep 2003
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PostPosted: 08:51 - 17 Jul 2015    Post subject: Reply with quote

The hard part is removing the old bearings. The rest of the job is pretty easy.

2mm of play will seriously affect your handling in a negative way.
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stinkwheel
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PostPosted: 09:04 - 17 Jul 2015    Post subject: Reply with quote

And 2mm of play can quickly become 10 or 20, or a failure to rotate altogether and then you're off it.
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sutty86
Trackday Trickster



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PostPosted: 10:53 - 17 Jul 2015    Post subject: Reply with quote

ok cheers guys not on it for a week or so now , so can sort out, is it worth asking garage to do it before mot?
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Andy_Pagin
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PostPosted: 11:18 - 17 Jul 2015    Post subject: Reply with quote

For a bike shop with the tools and facilities it's a very quick and therefor cheap job. Last time I was charged £20 for the bearings and £30 labour. Obviously it helps if you take the wheel off/on yourself.
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Kickstart
The Oracle



Joined: 04 Feb 2002
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PostPosted: 18:31 - 17 Jul 2015    Post subject: Reply with quote

Hi

Is this 2mm of wiggle in the wheel rim, or 2mm the wheel slides on the spindle.

If wiggle at the rim then probably a dead wheel bearing. But check the spacers to ensure they are not missing, which will wreck a bearing rapidly.

If sliding on the spindle then probably a missing spacer. But potentially also a very badly worn swinging arm preventing the spindle from doing up tightly (ie, the spindle runs out of thread before it clamps the wheel); only seen this once though.

All the best

K
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kramdra
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Joined: 28 Oct 2010
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PostPosted: 21:08 - 17 Jul 2015    Post subject: Reply with quote

Has the bike been in regular use?

I fitted a rear tire on my 125, getting it ready for MOT. Bearings were fine, turn smooth with finger, no play. They were fitted by a shop 3 years ago, sorn and garaged for 2 years very few miles since, no reason to suspect them.

Rode about 18 miles including to the mot and back, they now had some slight play and failed test. Looked under the rubber seals, the right bearing was 100% rust and would have failed rapidly... within 50 miles.

I will make sure to check under the rubber seal atleast once a year, possibly any time I have a wheel out.. takes only seconds.
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Teflon-Mike
tl;dr



Joined: 01 Jun 2010
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PostPosted: 13:32 - 18 Jul 2015    Post subject: Reply with quote

Kickstart wrote:
Hi

Is this 2mm of wiggle in the wheel rim, or 2mm the wheel slides on the spindle.

If wiggle at the rim then probably a dead wheel bearing. But check the spacers to ensure they are not missing, which will wreck a bearing rapidly.

If sliding on the spindle then probably a missing spacer. But potentially also a very badly worn swinging arm preventing the spindle from doing up tightly (ie, the spindle runs out of thread before it clamps the wheel); only seen this once though.

All the best

K


^^^^ This + Check the simple/obvious first.

If wire spoke wheel... check the spoke tension! Make sure wheel is true. Look at the spoke holes in rim and hub, make sure that the holes haven't fretted letting spokes go sloppy and rim walk around over the hub.
ALSO... and its a real 'Duh' one... the spindle nut tightens!
There's usually a dimple on the middle of the spindle, so that when you want to take the wheel out, if the spindle's a bit stiff... which if you have a bike with no center stand, and less than 'bright' spanner-monkey is trying to take it off without supporting wheel off the floor, it will be.... you can pop a taper-drift into the dimple to give it a wack.. course, sort of spanner-monkey who tries taking a wheel out without supporting it off the floor, is more likely to just wack the end of the spindle.... resulting in mashing the 'lead-in' and possibly the first couple of turns on the thread.... when put back together the nuts a bit hard to start.. but will often still go on... ONLY, the deformed treads can tap out the threads in the nut... BUT can still wind down the rest of the thread, probably rather tightly; but 'stiff' easy to think it's 'tight' without actually squashing swing-arm onto the spindle spacers, or for the nut to be stripped enough it wont put pressure to squash the swing-arm plates in.
Check rest of spindle assembly while you are looking; some swing-arms have pinch-bolts that have to be done up one end, before the spindle-nut, or it all stays loose, chain adjuster's can be fitted wrong or cocked, or slip, and again, stop the wheel being clamped up properly.

Wheel bearings tend to be pretty reliable, these days, especially as many are 'sealed' pre-greased units, and on a lightweight not that highly loaded. I'd only suspect them to be a more likely candidate if the thing has been sore used off-road, and they have been filled with muddy or salty water regularly, or the things been left derelict in partially dismantled state... so not the first conclusion I would jump to, as far as culprit & cure.
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