The gearbox and clutch sprocket is taking more adjusting with shims than I anticicpated. So while waiting for more shims to arrive I've been fine tuning every part in the gearbox trying to make for smoother shifting. This includes polishing the shafts, bores in the gears and points where the selector forks ride.
The gear selector cam plate was slightly warped so required dressing on the surface grinder. It was then burnished with a diamond lap then polished to a mirror finish on the surface that contacts the selector forks.
The surface of the selector forks that slides against the gear selector plate received a series of small dimples to help retain oil.
The new selector fork shaft was anything but smooth and while manually sliding the forks on it the drag was very noticeable. After lapping with 600 grit, crocus cloth and buffing to a polished finish, the forks now glide nicely when run through all the gears.
A lot of extra labor but in the end I think it will be time well spent.