Im really unsure about my gearbox bearings. Ive got it stripped down and ready to go back together, Im just unsure of the state of the bearings, as Ive not got much experience in judging such things. (NB: Incase your wondering....I opened it to replace all the seals, and also because im a curious s.o.b)

While im this deep in the box, and also considering its a 220,000km bike, should I just replace the bearings anyway?

I have another intact gearbox here of slightly newer vintage, perhaps ill open it and compare its bearings with these ones, for reference....


In Aus, is it cheaper to buy the suitable bearings from a local bearing shop, or is the Bins still the cheapest option?

If I just dropped the shafts and new bearings off at a bike mechanic would they be willing to do the swap for me? How many hours labour do ya reckon that would be? Only 1 I would hope.;..?

Or anyone wanna lend me a bearing splitter/puller/whatever other special bits are needed?

They are very common sizes and should cost no more than $70 including the seals even buying a high quality brand like SKF or Timken.

RicK G wrote:They are very common sizes and should cost no more than $70 including the seals even buying a high quality brand like SKF or Timken.

Each or for the set?

The whole six. One of the tapered roller bearings is the same as a front wheel bearing for a holden

RicK G wrote:The whole six. One of the tapered roller bearings is the same as a front wheel bearing for a holden

Wonderful. Bearing shop - here I come...

Hmmmm to do it my self or not do it my self. That is the question....

  Do it do it dooooo it   

     

Ok, I think I have all the specs for my K100RS gearbox and K100/K1100 hybrid frame/front end....

Correct any of this those of you in the know....

Steering Head                                   -	TAPERED ROLLER BEARING            -	28X52X16                                 -	2
GB Output	GROOVED BALL BEARING	20X47X14MM	1
GB Output	GROOVED BALL BEARING	25X52X15MM	1
GB Inter	GROOVED BALL BEARING	17X47X14	2
GB Input	TAPERED ROLLER BEARING	45,24X16,64X22	1
GB Input	TAPERED ROLLER BEARING	45X19,05X15,5	1

don't forget there is a preload on the fitting up Floyd ...the Haynes manual describes this pretty well

good luck mate !

When you get the ball races they will have a rubber seal on both sides just put a sharp screwdriver and get rid of the seals (they come very easily). You can get the shielded bearing with a steel shield on both sides but they are heaps more and not really needed.

floyd wrote:Ok, I think I have all the specs for my K100RS gearbox and K100/K1100 hybrid frame/front end....

Correct any of this those of you in the know....

Steering Head                  .	TAPERED ROLLER BEARING                                                       .	28X52X16	2
GB Output	GROOVED BALL BEARING	20X47X14MM	1
GB Output	GROOVED BALL BEARING	25X52X15MM	1
GB Inter	GROOVED BALL BEARING	17X47X14	2
GB Input	TAPERED ROLLER BEARING	45,24X16,64X22	1
GB Input	TAPERED ROLLER BEARING	45X19,05X15,5	1

The input bearing measurements seem weird...???


Thanks charlie!

3/4 inch and 5/8 inch
One more thing is when you remove the cover make sure not to mix the shims, They will probably be stuck to the inside of the cover with thick gooey oil. Keep an eye for them often you don't pick up they are there till washing is complete and they are in the tub and don't ask.

RicK G wrote:3/4 inch and 5/8 inch
One more thing is when you remove the cover make sure not to mix the shims, They will probably be stuck to the inside of the cover with thick gooey oil. Keep an eye for them often you don't pick up they are there till washing is complete and they are in the tub and don't ask.

Already made that mistake and mixed the shims up.....

Just went to the bearing shop and they were mighty pissed off that I didn't have a specific number for each bearing, only the measurements (they seem to be continually amazed that the general public are oblivious to the nuances of the bearing world)

One bearing in particular, he reckons does not exist, based on the specs I got from a micro fiche (45.24 X 16.64 X 22)

Bearing in question is the closest to the splines on the input shaft.

Anyone have these mythical numbers?

you haven't seen this yet Floyd ?
you might have to get the password for the downloads section ?

oopps disappeared

No I hadnt seen it Charlie, but literally seconds before you replied I stumbled apon it via google :0

What a fantastic resource. This forum makes me so glad I bought a K bike!

Thanks mate, that should keep them happy.

you realize I will have to remove the direct link to the downloads section ...hope you got it bookmarked

have fun Floyd ...and stick it up those bearing guys .....