Correct Lubrication for input splines

[billington92]

From watching Youtube videos and reading manuals I’ve learnt that I should lubricate the input splines to my R1150R (oil head) gear box every 40k miles. However there seems to be a difference of opinion on which lubricant to use.

A BMW trained Youtube blogger suggests that BMW use Staburags NBU 30PTM at the factory and recommend you do likewise:

https://www.youtube.com/watch?v=6gzR4WHD-94

However my Haynes manual lists Optimaol paste MP3 as the right stuff to use. I’ve found a German company who sell both in small quantities (10g each) because it is expensive, on eBay. Both tubs come as a single purchase for £17 (UK pounds).

My question is “Which should I use.”

The process of removing the gear box is a long one for an armature like me so I want to get it right first time.

Thanks for any advise you can offer.

[kirby]

I have the BMW manual and a Clymer manual and neither say anything about lubing the input shaft at all as part of regular maintenance.

Maybe you should be asking yourself why you really want to do that. I have never lubed my rockster shaft except when I removed the trans at 169K miles and there were no signs of lubrication and little ware (as in almost none). If you do take it apart then a small amount of lub is a good idea to keep oxidation to a minimum but there is little or no friction except for the clutch plate sliding a fraction of an inch.

Cars with standard shift trans with the same type of system as the splined shaft on the BMW go 100,000s of miles without any such "regular" lubrication of their input shaft.
Go ride.