I have a 1953 BSA M21 that leaks a bit of oil from the gearbox.I use straight 50 wt mineral oil in the Engine and gearbox .. ATF in the Primary case .
Just wondering if anyone has used Semi Fluid Grease in their gearboxes of their BSA's (my Norton
Big 4 uses it) ..
Could I drain the gearbox oil and replace it with semi fluid grease with out causing any damage ? Would there be any advantage in doing this ? The box is a wee bit noisy,could the grease make things quieter ?..
Of course, the solution would be to attend to the leaks and do the job properly,but at the moment this is not feasible ..
Thanks folks ..just wondering