Honda F660 Manuel De L'utilisateur page 28

4. Side clutch operation
The side clutches are used for turning the tiller to the right or to the left.
Turn the tiller to the RIGHT; Grasp the RIGHT side clutch.
Turn the tiller to the LEFT; Grasp the LEFT side clutch.
Reduce engine rpm before operating the side clutches.
Do not ever use the side clutches when pulling a trailer.
Avoid using the side clutches when going up or downhill.
In the case of heavy load trailing, side clutch operation should be
done carefully because it might be dangerous.
LEFT SIDE CLUTCH
RIGHT SIDE CLUTCH
25