Hi GB and All,
Glad to hear the BSA is running again,
I am still confused as to why the tappet adjusters sit like the are??
On loose guide's
A few weeks ago I was asked to look at a cast iron A10 head, it had been fitted with phosphor bronze guides
The valves were very tight in the guides! I got out a 5/16in. reamer and went to wind it through the guide
the guide moved as I pushed in the reamer
The PB would have expanded more than iron causing the guide to squeeze in on the valve stem
New CI guides and valve seats plus some new fins added and its back in service
While I was reassembling the cases with the new camshaft I noticed there was about a 1/16", 2mm of endfloat. I found a thin washer to put behind the pinion but removed it when I read that the breather cork controls endfloat.
I took a minute today (away from the HD marathon
)to go and check the spare crankcase and cam/gear that's fitted
I poked some feelers between the cam shoulder and the timing side bush, a .4mm feeler (16 thou) fitted in
by sliding the cam pinion in and out this seemed a lot (click ,clack)
From memory when I built other A10 engines camshaft endfloat is negligible
John