Suzuki RM-Z250 Owner's Service Manual page 65

PILOT SCREW (P.S.)
The pilot screw controls volume of the air/fuel mixture in slow
range. Pilot screw specifications indicate the number of turns
back from the lightly seated position.
Air/fuel mixture
Lean
Rich
THROTTLE STOP SCREW
The throttle stop screw determines the full closed position of the
throttle valve.
• Turn it clockwise to raise the throttle valve.
• Turn it counterclockwise to lower the throttle valve.
Too high an engine idle may cause driveability failure
such as lack of engine braking and poor deceleration
during brake application.
ENGINE IDLE SPEED ............................... !2-20
Pilot screw turn back
1 and 1/4 turns back
1 and 1/2 turns back
1 and 3/4 turns back
2 turns back
2 and 1/4 turns back
2 and 1/2 turns back
2 and 3/4 turns back
CAUTION
MACHINE TUNING 4-4