Thanks for the vote of confidence Nick. good things about the 750 big bore , 6kg weight saved, lighter B44 pistons ( less material from crown to gudgeon pin) and a dynamic crank balance make it smooth up to about 5.5 k with the stock balance factor, the stock chamber combined with the B44 piston tops gives a squish effect which helps the fuel burn.
at 9:something below 5 ish to one its an easy starter , the heavy flywheel really helps. On 21 tooth gearbox (One tooth more than normal) /47 rear sprocket gearing its in the sweet spot from 60 to about 90, stuff doesnt fall off or crack too much, the big downside is you need more brakes. Having thought a bit more about the outrigger bearing, maybe it is essential, before I fitted it I had a lot of bother with the clutch, ( it was shagged , new bits were fitted at the same time). Going up through the gears changing up at 5.5 gives enough poke to get past most stuff indecently quickly. I sometimes rev to 6 + but its not really any faster, the stock 30 mm carbs probably hold it back a bit at full chat, the flip side is the high gas speeds in the carb make it perform better, I had to fit 3 sizes smaller main jets , and a weaker needle jet it breathes harder faster gas lifts more fuel.Hardly ever needs tickled, starts of choke down to about 12 C. It does about 55 mpg cruising at 4- 4.5 K, seldom gets overtaken. At its best on hills, with twisty bits. It deals with A road tourist traffic without any issues, its my daily transport when the rain isnt falling, a very fun / practical bike. theres an overlong thread here if you want the gory details
https://www.britbike.com/forums/ubb...els-5-speeds-a65-750-oif-1971#Post541665, theres about 10 years of evolution, the pics might not work until the end, some were hosted by phot =£$ cket, who went all wrong, the ones near the end should be OK.
