Clutch lever 6mm or 8mm screw for R69s?

[pkrpkr]

Can anyone tell me what's the story with the clutch lever at the rear of the gearbox for an R69S?

Under the part number 1080166 in the parts book, suppliers now list a lever with M8 screw, but in my '63 R69s the screw is M6.
Are the levers with 6mm and 8mm screw both correct and interchangeable?

Thanks in advance,
Peter

[schrader7032]

The online parts fiche shows the same M6 bolt used for a 1957 R60 as well as a late R69S. Vech lists only the "6x1" bolt and has a part number for the clutch arm (#21521080166) at the gearbox for the R50-R69S so it's for all models. I'm not sure where the 8mm fits in.

[pkrpkr]

Thank you Kurt. According to Duane's site the 8mm screw was introduced in 1968, but I still haven't figured out if the lever retro-fits. Perhaps I should just buy one and try it out...

[schrader7032]

Peter -

Nice find! I'm wondering if what was introduced in 1968 was a precursor to what was going to be used on the /5 models when they came out. The part number of the lever arms are different for /2 and /5.

Are you trying to find a replacement for your /2 and there are none available?

[pkrpkr]

Yes that was my thought too (that it would be a precursor for /5).

Meanwhile Mark Hugget supplied more information: "The BMW technical drawing dated 13.05.1954 shows that the thread was changed from M6 to M8 on the 16.05.1967. As the majority of machine had an M6 thread, our levers are also with an M6 thread. If an enduser prefers an M8 thread, he can always drill and recut the M6 to an M8."

So that would suggest the levers are interchangeable.

Fortunately at least Mark Huggett has the version with the M6 adjusting screw. Several other suppliers still can supply NOS levers, but for M8 screws. And on eBay someone is offering the levers too, they look like a crude sandcast copy.

Thanks for your help Kurt, learned again!