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Author Topic: amount of play on rear wheel bearing?  (Read 610 times)

joeconti

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amount of play on rear wheel bearing?
« on: May 09, 2009, 04:14:18 PM »
Good evening
I have just bought a 86 R65 mono , which during its recent MOT stated that the rear wheel bearing had slight play.
When I phoned up the garage that carried out the inspection, he stated that some bikes have a natural amount of free play as oposed to other bikes.
For peace of mnd he said I was welcomed to bring in the bike for him to assess.
Does anyone know if this model should have any 'normal'free play or not?
many thanks
joe
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Offline Bob_Roller

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Re: amount of play on rear wheel bearing?
« Reply #1 on: May 09, 2009, 05:26:34 PM »
It depends on what 'free play' they are talking about, if you can grab the rear wheel, and apply force 90 degrees to the plane of rotation, and there is play, then there is a problem.

Just reread your post, and you have a mono style bike, so I'm not sure how the bearings  are installed, as the dual shock bikes have an axle, and tightening it up can reduce play.

If the free play, is with moving the wheel back and forth in it's normal plane of rotation, that is play in the drive train, worn final drive splines, play on the gears in the final drive, etc., and that is not much of a concern, as long as the drive splines are in decent condition.

Try to find out which they may be talking about.
« Last Edit: May 09, 2009, 05:32:59 PM by Bob_Roller »
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'81 R65
'82 R65 LS
'84 R65 LS
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Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Andy-Gadget

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Re: amount of play on rear wheel bearing?
« Reply #2 on: May 09, 2009, 06:21:41 PM »
Mono bikes are like G/S's and such, the rear wheel bearings are the crown wheel bearings in the final drive, not like twin shock bikes that have tapered roller bearings, and need to be shimmed.

Final drives use shims to adjust free play as well.

You can do it if you know your way around  spanner, but you need some tools not everybody has, like dial test indicators (dial gauge) and such.

If you leave it to the pros and they get it wrong, they have to fix it :)

see, http://www.webparts.com/diagram.php?btnr=33_0639&mospid=47892&hg=33&fg=10

Quote
It depends on what 'free play' they are talking about, if you can grab the rear wheel, and apply force 90 degrees to the plane of rotation, and there is play, then there is a problem.

Just reread your post, and you have a mono style bike, so I'm not sure how the bearings  are installed, as the dual shock bikes have an axle, and tightening it up can reduce play.

If the free play, is with moving the wheel back and forth in it's normal plane of rotation, that is play in the drive train, worn final drive splines, play on the gears in the final drive, etc., and that is not much of a concern, as long as the drive splines are in decent condition.

Try to find out which they may be talking about.
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