None, they are for driver only.
85 to 215 passengers - depending on the model !
None.
The original Wright Flyer held no passengers, only the pilot.
Passengers fly on a plane.
A 747-400 with 3 classes of service holds about 416 passengers. With 2 classes of service it can hold 524 passengers.
Two in front, two in back.
Passengers ride trains.
320 cc right fork. 325 cc left fork gives best ride.
lift
no
you just lift it as normal
That will depend on things like how far you are going and how many passengers there are, so there is no straight answer to that.