Should this wobble?

[scud]

I've split my 02 1150 GS (150,000 miles) in half, after I felt a tad of clutch slip and noticed a leak of oil between the gearbox and engine casing.

As I split the bike, I noticed a fine circular spring hanging round the cog thing sticking out of the gearbox.. the clutch push rod goes through the middle of it...(Is this called the INPUT shaft? I've got confused looking at input, output shafts between pages and diagrams!).

My next question is whether I should have any play in this cog thing. I can wiggle it around in a circle..not massively, but noticeably. Is it just because the seal has gone, or is it something else I need to worry about, such as a bearing somewhere?

The back of the clutch is all dry, so the oil was definitely coming from the gearbox, also when I emptied the gearbox oil, it was dark grey and looked like it had VERY fine bits of metal in it... (it looked in the light, like metallic paint effect, it was that fine). Do you think this could be as a result of the seal going? or is it something else. Cheers

 

[D6]

its the spring outa the seal, and i dont think the bearings any good either, thats what prob pulled the seal out

 

[Steptoe]

1) My next question is whether I should have any play in this cog thing.

2) , or is it something else I need to worry about, such as a bearing somewhere?

)

1) No

2) Yes, a bearing .

 

[scud]

1) No

2) Yes, a bearing .

Damn!!!!

Is this a job that can be done at home without specialist tools or would it be best to take the box to a dealer or suchlike?

 

[D6]

Damn!!!!

Is this a job that can be done at home without specialist tools or would it be best to take the box to a dealer or suchlike?

could do it at home if you are competant, better steptoe answering this than me, never done one myself, jus lookin in the manual

 

[L]

in my professional opinion













yep, its fecked.

 

[MattW]

Damn!!!!

Is this a job that can be done at home without specialist tools or would it be best to take the box to a dealer or suchlike?

Changing a bearing means a gearbox strip. Then you have to extract the old bearing from the input shaft, then you have to press the new bearing onto the shaft, then you have to rebuild the box and get the shimming of the shafts just right (or you'll knacker more bearings and undo all your hard work). This shimming requires either a special BMW jig or some cleverness with modified old pieces of gearbox (or other DIY jig) and depth micrometers etc. Oh and while you're in there you should really change any other bearing which looks even vaguely suspect and all the seals (not the sort of job you want to be doing more than you have to). You also need to be able to get plenty of heat into the right places when stripping and reinstalling the shafts / cover plate.

I guess you'll also be putting a complete clutch kit in too while the box is off (it'll probably be toast if it's oil contaminated)? Don't be tempted to just change the clutch plate.

I'm not afraid of spanners, but a gearbox rebuild is something I'd probably leave to a specialist (unless I wanted to do it specifically to 'learn' and was happy to run the risk of getting it wrong).

I know that gearbox work is normal stuff for Steptoe and people have also spoken highly Scriminger. I'm sure there are others, but these are two I've heard excellent feedback on.

M

 

[Steptoe]

You shim just the shafts on the 1150 gearbox, no need to shim them in the gearbox..

On the 1100 gearbox you shim the shafts to the box.

 

[MattW]

You shim just the shafts on the 1150 gearbox, no need to shim them in the gearbox..

On the 1100 gearbox you shim the shafts to the box.

Oops - I didn't know this was different on the 1150 - sorry if I caused any confusion.

 

[East London Geezer]

Bad news but 150,000 miles is not too sad.
I've got a 40,000 mile gearbox with new seals all round if you're interested.