Yamaha YZ250 Owner's Service Manual page 248

CARBURETOR AND REED VALVE
4-16
10. Install:
9 Throttle cable 1
9 Locknut 2
9 Mixing chamber top 3
9 Spring (throttle valve) 4
9 Ring 5
9 Throttle valve 6
NOTE:
9 While compressing the spring, connect the
throttle cable.
9 Align the projection a on the ring with the
groove b in the needle holder 7.
11. Install:
9 Mixing chamber top 1
9 Screw(mixing chamber top) 2
To carburetor 3.
NOTE:
9 Insert the throttle valve into the carburetor body
while pulling up the lever 4.
9 After installing, check the throttle grip for
smooth movement.
EC465391
Carburetor installation
1. Install:
9 Carburetor 1
NOTE:
Install the projection between the carburetor joint
slots.
ENG
4 Nm (0.4 m•kg, 2.9 ft•lb)