Noisy gear box

[(RIP) Yosi]

Similar switchgear aside, I doubt there are many other components between the 80/100GS & the 1100GS - very different bikes IMO. The 1100 & 1150 are far more similar.

What about suspension, frame, wheel, EFI, clocks, bodywork, seats, main engine block, Telelever etc.........

No point going on on this but the 1150 is an entirely different beast: Different gear box, clutch, switchews, everything. You'll be surprised how similar the eleven is to the lates generation of aircooled engines. Luckily, BMW decide to improve the elctrics with a proper car type alternator instead of the infernal contraption fitted to the aircooled...

 

[P.J.]

CLONK

...after all that to-do about gearbox lubrication I was panicked into changing the oil ('98 R 80 GS Basic) Couldn't get Synthetic in these parts so used Valvoline
80w/90 to GL5 Hypoid. The drain plug had a magnet insert - nothing untoward.

 

[(RIP) Yosi]

Changed to Silkolene GL5 oil. Not much difference. The same crap gear box. Less mechanical noise, probably due to the dampening effect of the thiker oil.
Waste of time and money? Probably, but I did it already and dampened the old oil so no way back now...

 

[Emperor Norton]

This is the one and only solution:

Throw out the mineral gear oil (as I do it at 12 k mls with ervery new machine) and replace it with full synthetic 75 W 140 (Castrol et al.). Sweetest gearbox ever, believe me. Good side effect: my 12 GS consumes 10% less petrol.

 

[(RIP) Yosi]

This is the one and only solution:

Throw out the mineral gear oil (as I do it at 12 k mls with ervery new machine) and replace it with full synthetic 75 W 140 (Castrol et al.). Sweetest gearbox ever, believe me. Good side effect: my 12 GS consumes 10% less petrol.

Where you get Castrol oil? Web lnk?
Cheers, Yosi