Yamaha YZ125(R)/LC Owner's Service Manual page 244

CARBURETOR AND REED VALVE
4-16
2. Tighten:
9 Screw (air filter joint) 1
9 Screw (carburetor joint) 2
3. Clamp:
9 Air vent hose 1
9 Overflow hose 2
Refer to "CABLE ROUTING DIAGRAM"
section in the CHAPTER 2.
4. Adjust:
9 Idle speed
Refer to "IDLE SPEED ADJUSTMENT"
section in the CHAPTER 3.
ENG