Suzuki RM-Z450 Owner's Service Manual page 192

• Remove the throttle valve assembly 5.
• Disassemble the throttle valve assembly.
6 Throttle valve
7 Bearing
8 Jet needle
9 Clip
0 Collar
• Remove the throttle shaft E with the link arm F, spring G,
plastic washer H and steel washer I.
NOTE:
Turn the throttle shaft E counterclockwise while holding down
the acceleration pump lever A and clear the stopper B of the
pulley from the throttle stop screw C.
NOTE:
Before removing the pilot screw J, turn it clockwise until it lightly
seats and record the number of turns.
• Remove the pilot screw J.
A Spring
B Needle set screw
C Floating valve
D Seal
FUEL SYSTEM 12-7