A few more photos if you are interested. Mine has twin 28mm Mikunis and dual point distributor (std). Mileage is 24000 approx. Built 1971 for the 1972 model year, so a fair bit later than an A10, so the engineers had plenty of time to improve and tweak it from original. I am no expert but it looks pretty substantial to me internally and has great oil return when at idle (1000rpm) .Replaced main bearings while it was apart and one of the originals was noisy and rough. New pistons are first oversize @ .25mm. (original pistons were still in it)
Just a note on the gearbox as well, they did change the shift pattern to the 1 down 3 up normal style at some stage after the test report posted earlier and also made other modifications to make it shift better.
All in all,certainly not a BSA, but still a good bike IMHO.
Sorry posted the head shot twice, oh well