The amount of backlash can be changed by turning the balancer shaft which has eccentric journals.
Start the engine and let it idle.
Loosen the clamp bolt [A] and turn the balancer shaft [B] clockwise [C] until the balancer gear makes a whining sound.
Turn the shaft counterclockwise [D] until the balancer gear whining sound disappears and tighten the clamp bolt.
Torque - Balancer Shaft Clamp Bolt: 9.8 N·m (1.0 kgf·m, 87 in·lb)

Balancer Installation
Balancer Damper InspectionFlap and Rear Fender Rear Removal
Remove:
Front and Rear Seat (see Front/Rear Seat Removal)
Seat Covers (see Seat Cover Removal)
Vehicle-down Sensor Connector [A]
Screws [B]
Clear the seat lock cable [C] from the seat lock unit [D].
Take off the seat lock unit and the bracket.
Remove:
Bolts [A] (Both Sides ...
DFI System Wiring Diagram
Part Names
1. Air Intake Solenoid Valve (Other than US, CA and CAL Models)
2. Front Wheel Rotation Sensor
3. Engine Stop Switch
4. Starter Button
5. Air Switching Valve
6. Stick Coil #1, #2, #3, #4
7. Spark Plugs
8. Intake Air Temperature Sensor
9. Crankshaft Sensor
10. Secondary Fuel ...
Fuel Tank Installation
Note the above WARNING (see Fuel Tank Removal).
Run the hoses correctly (see Cable, Wire, and Hose Routing
section in the Appendix chapter).
Check that the dampers [A] are in place on the fuel tank.
If the dampers are damaged or deteriorated, replace
them.
If the fuel tank brack ...