Honda F660 Manuel De L'utilisateur page 29

5. Gear shift operation
The transmission is of a three forward speeds and one reverse speed
transmission (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.
Gear shifting
1. Move the throttle lever to the right fully to bring the engine speed to
idle.
2. Disengage the main clutch.
3. Shift into required position.
6. Normal operating angle
Lower the handle slightly so the front of the machine is raised about
6 〜 8°.
To get the maximum advantage from the tiller, try to hold the machine
at the angle shown while you are tilling the ground:
26
SUB SHIFT LEVER
6 8° 〜
MAIN SHIFT LEVER