When you pull in the clutch, you
disengage the engine.
You clutch in and select the gear.
Gear 1 = Push off
Gear 2 = Low speed, acceleration
Gear 3 = Acceleration, mid range speed (L)
Gear 4 = Acceleration, mid range speed (H)
Gear 5 and above = Cruising.
You actually move with your clutch, with the proper gears
engaged
The trottle only provides the power.