Stuck on side of the road... (clutch?)

[bobmusick]

Here are the drive shaft and final drive spline connection. The driveshaft seems fine to me (but as you've all seen I may not be the best judge, ha) but the final drive seems just a little worn. Opinions?

[technostructural]

It's best to judge the condition of the splines when all of the grease/lube is cleaned off, but these do look quite worn. I'm sure the others will chime in on this, but a shot of the final drive from straight on would be helpful too.

[Martin]

Sorry bad news all badly worn, good splines have a flat on the peak of the splines all the way along them. Absent in your pictures.
Regards Martin.

[Andy FitzGibbon]

Yeah, unfortunately those all look pretty bad... note how your end shots show a "saw tooth" pattern, rather than a symmetrical spline pattern.

Andy

[technostructural]

Chris Harris provides his thoughts on how to judge spline wear here (8:37 in video):





Take note of his reference to the "step" in the splines.

[bobmusick]

Ahhhh I have the driveshaft off and can see what some good splines look like in person too (going from output shaft to driveshaft) but thank you all so very much for helping me identify the issues. I'm a bit of an eBay fiend so parts shouldn't be too bad. I have the clutch on order and will now begin my search for new driveshaft and final drive gear.

Thanks all so much again!

[Laitch]

So looks like I have only one of those little dowels unless it fell out. Will look around for it but it didn't seem like it was there.

Look on the transmission case.

[bobmusick]

Look on the transmission case.

Oh I did right after and yeah it's not there. :/

[Laitch]

Oh . . . :/

If it were my bike, I'd get one from MAX BMW to replace the missing one; it should be located on the diagonal. Is easy enough to determine where it should go.

[Elipten]

Those drive shaft splines are very worn and I would not put that back into the bike.

You need to clean the final drive splines with solvent and a tooth brush and then give us an in focus end shot.

Guys is Bruno back in business to help him?

Did you put paint marks on the clutch parts to get it aligned again when putting it back together?

I would replace rear seal and o-ring and many of the bolts and washers to reassemble the clutch assembly are one time use.


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[The Mighty Gryphon]

Besides a transmission I have a final drive.  I will give you a great deal on them.  I should have a dowel as well if you need one.  Not only can I give you a great price, but I am near by and can save you the shipping on a couple of heavy parts.

[Laitch]

Besides a transmission I have a final drive.  I will give you a great deal on them.  I should have a dowel as well if you need one.  Not only can I give you a great price, but I am near by and can save you the shipping on a couple of heavy parts.

Help Gryph empty his garage so he can try a four-domino spill. He's making a generous offer here, bobmusick. If I weren't inappropriately feeling lucky, I'd try to snag that transmission for myself.

[Laitch]

By the worn condition of all those parts, I'm sticking by my concrete block/skewed mileage theory. That bike had a long, hard workout in its history.

[bobmusick]

Besides a transmission I have a final drive.  I will give you a great deal on them.  I should have a dowel as well if you need one.  Not only can I give you a great price, but I am near by and can save you the shipping on a couple of heavy parts.

Sent an email back :)

[bobmusick]

If it were my bike,

Alright! Definitely want to do as much as I can now while it's all apart. Not that I mind the work, but ya know, a clean garage and a rideable bike aren't too bad of things...

[bobmusick]

Did you put paint marks on the clutch parts to get it aligned again when putting it back together?

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Didn't mark (oops) but have been taking LOTS of pictures through whole process.

[The Mighty Gryphon]

I have found what looked like factory balance marks on the clutch parts in my bikes.  They are very faint, but if you didn't go crazy cleaning them, a close inspection may reveal them.