Honda FF 300 Owner's Manual page 26

Rear wheel tread adjustment
Rear wheel position can be changed to adjust the rear wheel tread in
accordance with the tilling width.
1. Set the tiller on a firm level ground and hold it securely by placing a
suitable block under the transmission case and raising the rear
wheels off the ground.
2. Remove the retaining pin and wheel pin, and remove the rear
wheels.
3. Reverse and slide the rear wheels onto the wheel shaft.
4. Insert the wheel pin by aligning the pin holes and install the
retaining pin. Be sure to install the right and left rear wheels in the
symmetrical positions.
WIDE TREAD
RETAINING PIN
WIDE TREAD:
410 mm (16 in)
WHEEL PIN
REAR WHEEL
NARROW TREAD:
280 mm (11 in)
NARROW TREAD
RETAINING PIN
25