They are indeed a mystery when opened up!
On a 4 speed, 2 sets of drive pawls, one set for 1/2nd, and other for 3/4th.
I have another 'cross-over' bike with Shimano 6 speed enclosed hub gear and it is like silk, but at least 50 years between them....
My 'new' Royal Enfield has one single speed, so pleased!
