Re: oilheads-digest V4 #188

[Tom Cutter <tpcutter@xxxxxxx>]

<<As I understand it the speedo cable is similar to all the other 
cables on
these BMW bikes - no lubricating of any cable to be done.  Just the 
ferrule
at the end of the, for example, clutch cable where it has to accommodate
some rotational friction against the lever.>>

You are not understanding the design of the cale correctly. Throttle 
and clutch cables go in and out, needing longitudinal support and lube 
from the teflon sheath. Speedometer cables spin in the housing, which 
would rapidly eat through a teflon lining. Speedometer cables DO 
benefit from cleaning and lubrication with lithium grease.

<<So, it can and does "hurt" to lube the speedo cable.  However a light 
lubing
of the bearing and gear surface of the white PTFE large gear with 
Vaselene
has worked well every time I change a tyre.>>

Lithium grease is less likely to degrade the nylon gear, and less 
likely to attract dirt. If the gear is worn AT ALL, replace it.




Tom Cutter
Yardley, PA
http://www.RubberChickenRacingGarage.com
*In the last lap, the wheel bearings seized, making a sound like a cat 
being turned down in a lathe.*