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Service interval for wethead GSA driveshaft

146023

New member
I am looking for info regarding lubing the driveshaft splines on a a wethead GSA. I have a 2015 GSA with 66,000 miles accured. What is the recommended service interval for the spline lube? I cannot find any info published by BMW.
 
If you have it apart for some other reason, or if you ride in deep water and submerge the swingarm, put some lube on the splines. Spline lube is not on the maintenance schedule. The design of the rear suspension is essentially a perfect parallelogram, so there is no spline movement as the wheel moves up and down. It's common for the splines to be found free of grease but still unworn.
 
On our K1300S bikes, I tipped back the final drive and also pulled back the front boot so I could check the splines. They were fine, but I still cleaned them and applied new lube.
I plan to do the same on our wetheads because I have seen some nasty rusty splines on new GSs and at least one said he had never went through a water crossing.
As mentioned above it's not mentioned in the service schedule.
 
On our K1300S bikes, I tipped back the final drive and also pulled back the front boot so I could check the splines. They were fine, but I still cleaned them and applied new lube.
I plan to do the same on our wetheads because I have seen some nasty rusty splines on new GSs and at least one said he had never went through a water crossing.
As mentioned above it's not mentioned in the service schedule.

On my 2005 RT I had to tip the final drive down to drain the oil, so it only made sense to grease the splines while they were accessible. It is easy and quick to do.
 
On my 2005 RT I had to tip the final drive down to drain the oil, so it only made sense to grease the splines while they were accessible. It is easy and quick to do.

The issue is the splines on the transmission output shaft. You could not access those by simply lowering the FD.
 
I’ve tried that and, while possible, found it more effort than removing the swing arm. Doing so also allows for a careful check of the u-joints.
 
I’ve tried that and, while possible, found it more effort than removing the swing arm. Doing so also allows for a careful check of the u-joints.

It was easy on the K1300S. I have not tried it on Wethead R1200RS and may find it more difficult.
Good point on the U-joint check.
 
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