If they appear damaged or deteriorated, replace them.

Balancer Adjustment
Torque LimiterDFI Parts Location
Main Throttle Sensor [A]
Subthrottle Sensor [B]
Idle Speed Control Valve Actuator [C]
Subthrottle Valve Actuator [D]
Intake Air Pressure Sensor #2 [E]
Stick Coils #1, #2, #3, #4 [F]
Air Switching Valve [G]
Intake Air Pressure Sensor #1 [H]
Water Temperature Sensor [A]
Primary Fuel Injec ...
Operating Procedures
Clean the seat area carefully.
Coat the seat with machinist’s dye.
Fit a 45° cutter into the holder and slide it into the valve
guide.
Press down lightly on the handle and turn it right or left.
Grind the seating surface only until it is smooth.
NOTICE
Do not grind the seat too ...
Valve Clearance
Valve and valve seat wear decreases
valve clearance, upsetting valve timing.
NOTICE
If valve clearance is left unadjusted,
wear will eventually
cause the valves to remain
partly open; which lowers performance,
burns the valves and
valve seats, and may cause serious
engine damage.
Valve cle ...