Honda F506 Manual De Explicaciones página 30

5.Gear shift operation
The transmission is of a three forward speeds and one reverse speed
transmission (F510: six forward speeds and two reverse speeds by
multipling the two speeds of the sub transmission). When shifting the
shift lever, make use of the shift lever indicator.
REVERSE
NEUTRAL
SHIFT LEVER
(F506)
REVERSE
MAIN SHIFT LEVER
NEUTRAL
SUB SHIFT LEVER
(F510)
Gear shifting
1.Move the throttle lever to the right fully to bring the engine speed to
idle.
2.Disengage the clutch.
3.Shift into required position.
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