A forum for owners of Yamaha TTR250 trail and enduro bikes!

petenz · Super Guru

Rear wheel Bearing/seal sizes

ttboof · Super Guru

Been out riding all day

Will have a look in the shed tomorrow I might have the old boxes there are three bearings two sizes the ones on the sproket side have a bigger inside diameter so the spacer slips in

A bit to dark and having an ale at the moment

-- Edited by ttboof on Saturday 6th of May 2017 08:55:33 AM

petenz · Super Guru

what I'm saying here......
When I looked for the sizes it struck me these sizes given can't be right..
seal with a smaller OD (47mm) than the bearing (60mm)...
The seal would have to be the same OD or larger ......
even 22X60X? is a strange size for a metric deep groove ball race....
not listed in either of my bearing books.. SKF or FAG...

was just hopeing to get the bearings & seals before I punched them out

think I will wait get them out and measure it up.....

...

-- Edited by petenz on Saturday 6th of May 2017 10:27:39 AM

mossproof · Super Guru

It's 60/22 Pete, not 60x22. It's the bearing designation not related to it's dimensions.

petenz · Super Guru

mossproof wrote:
It's 60/22 Pete, not 60x22. It's the bearing designation not related to it's dimensions.

Ok that sounds better...

so it's a 22x44x12

found it in odd size bearings listings

====> https://bearingsdirect.com/209-odd-size-bearings

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-- Edited by petenz on Sunday 7th of May 2017 12:46:28 AM

-- Edited by petenz on Sunday 7th of May 2017 12:51:31 AM

JOHNYBOY · Super Guru

doesent this mean 6022 2rs means 2rs 2 rubber seals on each bearing if im right

petenz · Super Guru

it dose..

.

TTRfan · Super Guru

Just catching up on some old posts that arrived whilst I was on holiday and came across this thread.

This is what it says in the FAQ at http://www.ttr250.com/#Wheel_Bearings

Rear wheel takes 3 x 60/22 2RS size - 22x44x12 and oil seals for wheel 2 x 28x47x7.
Front wheel LEFT takes 1x 6003 2RS - size 17x35x10 and oil seal is 22x35x7.

Front wheel RIGHT takes 1x6202 2RS - size 15x35x11 and oil seal 20x35x5 (digital speedo models only - blue TTRs don't use a seal on the speedo drive side).

Is it wrong guys? If so, I need to update it asap.

Brian

petenz · Super Guru

no .. it's right... i took the 60/22 as the size..... when it was the number....

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devon_rich · Senior Member

Talking of bearings, someone mentioned flicking the seals out of the bearings and replacing the grease before fitting. Does this sound right?

ttboof · Super Guru

I always like to wash the grease out and replace it with waterproof wheel besting grease . just be Carefull when flicking the seals out . I still seem to have to replace them every 18 months or so

petenz · Super Guru

devon_rich wrote:
Talking of bearings, someone mentioned flicking the seals out of the bearings and replacing the grease before fitting. Does this sound right?

Ok..here we go......

what seems like a small amount of grease in the bearing has been carefuly calculated..

a bearing needs to have fricton thats what makes the balls roll with out it they skid in the races...

and to much grease has the same effect.. stoping or slowing the balls down so they skid..

there is aready skid in a ball race as the ball is in between 2 races of diffrent lengths & the ball can not roll around both at

the same time.. so there is a degree of ball skid anyway...

but they don't last for ever anyway... so it prob dosn't matter to much....

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