Anyone seen one of these? (breather pinion)

[unclemeat]

Just to comment on bsa-bills query...You said that when you tightened up the nut, the camshaft locked up, well....that could be an after-market woodruf key that is protruding a little more than it should, and is rubbing/pressing on the bronze bush when its all tightened up. I had exactly the same problem, and had to shave a little height and length off the key. It is still a snug fit in both shaft and pinion with plenty of land to engage, but now the nut can be fully tight with no locking up of the shaft.

[bsa-bill]

Now there's something I must check Unclemeat while the engine is still on the bench

All the best - Bill

[octane]

...You said that when you tightened up the nut, the camshaft locked up...

Had the same problem:
the place that the camshaft driving pinion 'rest' up agains on the camshaft
was 'lower' than the bronze bushing,
, and the woodruff touched the bushing as well.
 (you can see on the pic that I've filed down the end 'pointing' away.)




There was obvious scrape-marks on the pinion
and I has a friend remove a bit (more) material (of cause not right around the hole)
so it would run freely after being tightend up fully.



I thougth that perhaps it was because I
installed a new camshaft (from SRM) that was ever so slightly different in that place.