The engine in the wife's R65/80 is a 1987 model and has the later rocker gear.
It is slightly quieter than the earlier type but the difference is not worth anything like the price.
As I said to the guy contemplating the conversion in one of the Stalkerbook groups - Advertising Victim.
I speak from personal experience.
In the mid 1980s that now deceased Shyster punting BMW modification bits convinced me to modify my R100's rocker gear for quieter operation.
The mod consisted of milling off an amount from both ends of the rocker (after first pressing the needle roller bearings further in). The next step was to fit two hardened , ground steel thrust washers sandwiching a Torrington bearing - from memory the same was was then used for a clutch thrust bearing.
Final adjustment was achieved by the use of shim washers to leave only a minute amount of play.
Any yes, the happy "ticky, ticky" of correctly adjusted tappets was replaced by the almost as loud "rustle rustle" from 8 Torrington bearings.
It is an odd sound and everytime I start that bike I am reminded of my gullibility.
And, by the way, I prefer "ticky ticky" to "rustle rustle"!
