Honda FR500 Owner's Manual page 29

Wheel Weight Installation
The wheel weights improve traction on soft or
marshy ground. To install the weights, insert two
bolts and secure them with the nuts supplied.
Tighten the bolts and nuts securely to prevent them
from being turned out during operation.
Tilling depth adjustment
The tilling depth adjustment can be made by
removing the retainer and sliding the drag bar up
or down as necessary.
(1) Wheel weight
(2) Drag bar
(3) Retainer
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