I'm going to replace the ignition switch on my Lario this afternoon,went bad on me two weeks ago .
I had the instrument cluster opened up about 5 weeks ago, for an inoperative low oil pressure light .
While I was there, I removed the tachometer (mechanical tach) and speedometer drive cables, you can remove the cables from the outer conduit .
Cleaned and lubed them with a light air tool oil .
I would personally rather use a light grease than oil .
The only other bike I had with a mechanical tach, a '79 Yamaha XS400, I was told not to use grease on the drive cable, due to the possibility of it working it's way up the cable into the indicator .
Is this a generally known fact, or just merely fiction
Haven't given it much thought for the last 32 years, since I got the '81 R65 .