Drive shaft noise ??

[donbmw]

Just because you have the clip installed does not mean you will not have a problem. I had my 1975 R90/6 transmission go out on me. Had changed the oil about 3 mouths before this. Had no sign of abnormal wear going on or any noise vibrations when it was going. I had stopped for a break after going about 70 miles and was smelling hot oil and felt the transmission being to warm. Took and chance on riding the bike back closer to home and had it what felt like it was going in and out of gear a couple of times. Stopped at the next exit and called the wife to come get me. Took the transmission apart and found the bearing trying to come of the shaft even though the clip was there. This had not had any work during the time I have had it until then. So even with or with out the clip you could have a problem and not no it until it happens.

Don

 

[40427]

Got the bearings installed , all shimmed up and the transmission back in the bike today. Decided to go ahead and use a shaft with the cir clip groove and a clip.

I flat ran out of energy and we will get the rest of the bike back together on Monday.

Note ::
When we had the transmission case completely empty and gave it a good wash there was a lot more metal debri in the nooks and crannies than was indicated by the drain plug. :

My thoughts on this are:
if you have any swarf on the drain plug, disconnect the drive shaft and turn the output flange by hand. If it does not turn smoothly and freely an overhaul of the gear box should be on you calendar .

It's a PITA job for sure but really not all as difficult as some might think. It's just nuts and bolts after all. We did it with hand tools and a couple of pullers, a heat gun and a Haynes manual a michrometer is also recommended. Access to a bearing press would be nice if you have one near by. Otherwise it just takes some careful hands and a little faith.

I will report back after test rides have been done.
Doug

clarification: I did not attempt this job on my own, two other MOA members; John Thomas & Mac McMcann who have much more knowledge than I led me through the process. Left to my own , I would probably have sent the transmission to a specialist.

 

[helmut_head]

My thoughts on this are:
if you have any swarf on the drain plug, disconnect the drive shaft and turn the output flange by hand. If it does not turn smoothly and freely an overhaul of the gear box should be on you calendar .


clarification: I did not attempt this job on my own, two other MOA members; John Thomas & Mac McMcann who have much more knowledge than I led me through the process. Left to my own , I would probably have sent the transmission to a specialist.

Amen!

 

[40427]

All back together now, test ride complete.
Like butter as they say.

Should be good for another 27 years or so.

Thanks to everyone who replied with advice .

see ya'll in Sedalia