You should also read the Harley owners manual.
Gives no mention about the workings of the bike as far as matenance, spark plugs, tires, controls, oil, etc.
It tells you how to shave your goatee. What beer to drink. Exactly how to prop your legs in the air while riding, etc.
Yet Harley riders always have "groupies" hanging around hoping for a slow ride on American Steel....and crotch rocket riders don't.
Go figger....:)