If they appear damaged or deteriorated, replace them.

Balancer Adjustment
Torque LimiterExploded View
CL: Apply cable lubricant.
EO: Apply engine oil.
G: Apply grease.
HG: Apply high-temperature grease.
L: Apply a non-permanent locking agent.
M: Apply molybdenum disulfide grease.
R: Replacement Parts
S: Follow the specified tightening sequence.
Specifications
Special ...
Headlight Aiming Adjustment
NOTE
Do not turn the bolts [A] because the reflector in the
headlight comes off.
(In the photo, the headlight unit has been removed for
clarity.)
NOTE
The left adjuster [A] and right adjuster [B] can move the
direction of the headlight beam to up, down, left and
right by turning each a ...
Piston Ring, Piston Ring Groove Wear Inspection
Check for uneven groove wear by inspecting the ring seating.
The rings should fit perfectly parallel to groove surfaces.
If not, replace the piston and all the piston rings.
With the piston rings in their grooves, make several measurements
with a thickness gauge [A] to determine pisto ...