bearings

[Russfjr1]

Hi all, doing a few little modifications to my FJ and just to be on the safe side along with the mods new wheel bearing and the one in the sprocket carrier. The R1 rear has some strange size for the carrier 28mm on the ID  62mm on the OD and 16mm thick. On the actual koyo bearing is the number for it  "6206" that's easy I thought until looking in my book to find 16mm correct 62mm correct but 30mm on the ID not correct !!!!!!! making the one I need totally not standard, in fact bearings with a 28mm ID are not to common  mix that with the 62mm OD and nothing. My only thought is that it must be a Yamaha special  Just to make us buy genuine parts at inflated prices..... However  I can get a standard 6206 with the 30mm ID make a sleeve with the required 1mm wall but made to incorporate the original spacer    Even better the 6206 bearings start at about £3.50

If anyone has had / got the same problems send me a pm and I will see if I can make a sleeve / spacer for you    All I need is good accurate measurements.     

[Pat Conlon]

Considering the loads involved, I am not a fan of bearing sleeves with a wall thickness of 1mm.

How much are the oem bearings? $25 or so?  Chump change.

[Russfjr1]

Considering the loads involved, I am not a fan of bearing sleeves with a wall thickness of 1mm.

How much are the oem bearings? $25 or so?  Chump change.

For that bearing that might be, but change it a few times and that adds up, what about other bearings that just might not be available?  I was just offering a alternative or a solution. And just for a bit of info for you I did my apprenticeship at Rolls Royce so I do know a little about what is acceptable and what isn't, whilst I agree a sleeve is not the first choice, when made from a decent material, put in place with the appropriate lock-tight they work fine.

This of course is only my humble opinion with about 35 years experience and knowledge to call on, but that aside I apologise and bow down to your obviously superior knowledge and much better bank balance than most.

Last time I try to give a bit of free advice / help and info       

[Pat Conlon]

Russ, I did not intend to upset you nor belittle your knowledge or technical ability.  Forgive me.

I was just expressing my opinion, which is simply, I would not bet my life on them... That's just me.

I don't consider wheel bearings a recurring cost.

[Russfjr1]

Russ, I did not intend to upset you nor belittle your knowledge or technical ability.  Forgive me.

I was just expressing my opinion, which is simply, I would not bet my life on them... That's just me.

I don't consider wheel bearings a recurring cost.

Sorry had a bad day,

Everybody has there own opinion, I change bearings at 8 to 10,000 miles having had a new one (about 450 miles) fail on the rear of my zzr1100  scary moment to say the least. And you are right standard bearings are so cheap and the fact that your life (or underwear) could depend on them you should change them out with no worry about the cost. However the bearing in question is a sprocket carrier bearing and because of the odd size in comparison it is expensive.

Now this next part is alarming KOYO AND YAMAHA ARE BOTH AT FAULT    to leave the markings on that bearing of 6206 is criminal neglect, no not an over statement but in my mind true, the 6206 as stated before has an ID of 30mm I have been told stories and read on some R1 forums of people replacing this bearing on part number only, then when fitted after a short time the bike does not feel right or they have some sort of clicking sound from the rear or both. The problem only comes to light when they start striping things and realise the 2mm difference in bearing to axle size.  Because the bearing is a different size GIVE IT A DIFFERENT BEARING PART NUMBER MR KOYO AND MR YAMAHA that's the idea of numbers on bearings and the like, you go to the shop quote a number and get the correct part.

I think the only reason the rear wheel did not fail totally is that the bearing was only acting as a spacer nothing more then when settled in after a few hundred miles things started to happen.     

[the fan]

From a Yamaha part number perspective this gets even more interesting.

a well known 'secret' was that Yamaha (and others) buried the standard bearing number in the part number.

For instance My YZF1000 rear wheel uses a 6206 series bearing in the cush drive (with a sleeve spacer combines with the thrust washer...)

The part number is 93306-20640-00

Oddly when I checked 09 and 11 R1 for the same part I get a part number of 93306-20531-00 which clearly does not call out the proper bearing size (25x52x15 mm) Odd...


Russ, are there any other numbers on the bearing after the '6206' if it is a non standard bearing it should have a code behind it to designate the deviation from a standard bearing. I don't have my bearing identification chart in front of me but normally any difference (radial seals, Snap ring grooves ect) would be called out.

[fj1289]

Just answered this on the other post -- 62/28 is the correct bearing number.  [EDIT] -- 62/28 is 58mm OD -- pretty sure what my R1 wheel uses -- its about a 2003 (3 "straight" spokes)

Yamaha is HORRIBLE about the wheel bearing numbers embedded in their parts numbers.  This is the third time I've seen them be wrong.  You may be able to "parts swap" off the parts fiche for other motorcycles, but NOT with Yamaha!  I know ThunderAce and R1 numbers are jacked -- I wonder about R6 stuff?  Pretty sure FZ1 is also wrong in the fiche...

and that all goes for front wheels too!

[fj1289]

What year R1???

I'll have a look at mine tonight - it's on the shelf right now waiting on the drag bike to go back together

[Russfjr1]

From a Yamaha part number perspective this gets even more interesting.

a well known 'secret' was that Yamaha (and others) buried the standard bearing number in the part number.

For instance My YZF1000 rear wheel uses a 6206 series bearing in the cush drive (with a sleeve spacer combines with the thrust washer...)

The part number is 93306-20640-00

Oddly when I checked 09 and 11 R1 for the same part I get a part number of 93306-20531-00 which clearly does not call out the proper bearing size (25x52x15 mm) Odd...


Russ, are there any other numbers on the bearing after the '6206' if it is a non standard bearing it should have a code behind it to designate the deviation from a standard bearing. I don't have my bearing identification chart in front of me but normally any difference (radial seals, Snap ring grooves ect) would be called out.

No other numbers or marks, that's the bit that makes it dangerous.... people order a 6206 but it's simply not the correct bearing for the job.

As a side note I take it that the sleeve / spacer is a Yamaha part?

[the fan]

From a Yamaha part number ....

No other numbers or marks, that's the bit that makes it dangerous.... people order a 6206 but it's simply not the correct bearing for the job.

As a side note I take it that the sleeve / spacer is a Yamaha part?

The spacer is a stock YZF1000 part. Next time I have the wheel off I will measure it and take a picture.