I don’t remember, but we changed here in the states long before the Brits did. And even though the electronic principles are the same, it just never did work as good as negative ground. I have no clue why.
I do know we had better luck with factory positive ground systems if we chased down a new battery that had not been filled with electrolyte yet or had any charge. Then filled it our selves and purposely charged it for the first time backwards.
How many people know what it means to check the oil dipstick in the carburetors?
I owned a ‘72 Norton 850. Very strong bike.
On cold start, it would spit a squirt of oil from both pipes...
Fact is, electrical engineers don’t know which “direction” electricity “flows”. It is so instantaneous it doesn’t necessarily have a beginning or an end.