hello bikerboy . the chaincase cover is on hold until the bottom ends rebuilt as need to know clearances. i havent found any alloy welders i can afford yet . i m in london if any help.
A mate has a s/a b33 with a triumph/a65 alternator fitted into the primary, the cush drive “dome” has been removed and replaced with a larger diameter “flat” done to accommodate the alternator, so some skilled ally welding was required.
The point of telling you this is:
A) i guess it is possible to fit an alternator to a std (single) crank, so maybe the twin crank as well.
B) the modified primary cover does not have any bolts at the front, i guess because the alternator prevents that, but the cover seals ok anyway.
I didn't take any pics of the b33’s inside case mods when I was helping my mate fix the 5 speed triumph box it also has, wish I had now as it is a potentially neat mod for my b31 rigid (which I’m pleased to say now has a bob newby belt drive
)