Yamaha YZF-R125 Service Manual: Installing the throttle body

Yamaha YZF-R125 Service Manual / Fuel system / Throttle body / Installing the throttle body

1. Install:

  • Throttle body joint clamps

NOTE:

Align the projections "a" on the throttle body joint with the slot "b" in each throttle body joint clamp.

Installing the throttle body


2. Install:

  • Throttle body joint

NOTE:

Align the projection "a" on the throttle body joint with the slot "b" in the intake manifold.

Installing the throttle body


3. Install:

  • Throttle body

NOTE:

Align the projection "a" on the throttle body with the slot "b" in the throttle body joint.

Installing the throttle body


4. Adjust:

Throttle cable free play Refer to "ADJUSTING THE THROTTLE CABLE FREE PLAY" on page 3-6.

5. Connect:

  • Fuel hose
CAUTION:

When installing the fuel hose, make sure that it is securely connected, and that the fuel hose connector cover on the fuel hose is in the correct position, otherwise the fuel hose will not be properly installed.

NOTE:

  • Install the fuel hose securely onto the fuel pump until a distinct "click" is heard.
  • To install the fuel hose onto the fuel pump, slide the fuel hose connector cover "1" on the end of the hose in the direction of the arrow shown.

    Checking the throttle body
    1. Check: Throttle body Cracks/damage Replace the throttle body. 2. Check: Fuel passages Obstruction Clean. a. Wash the throttle body in a petroleum-based solvent. Do not us ...

    Air induction system
    1. Air induction system hose (air filter case to reed valve assembly) 2. Air induction system reed valve assembly 3. Air induction system hose (reed valve assembly to exhaust pipe) Checki ...

    Other materials:

    Checking the primary driven gear
    1. Check: Primary driven gear "1" Damage/wear Replace the primary drive gear and clutch housing as a set. Excessive noise during operation  Replace the primary drive gear and clutch housing as a set. ...

    Installing the shift forks and shift drum assembly
    1. Install: Shift fork-L "1" Shift fork-C "2" Shift fork-R "3" Shift drum assembly "4" Springs Shift fork guide bar "5" NOTE: The embossed marks on the shift forks should face towards the right side of the engine and be in the following sequence: "R", "C", "L". 2. Check: Tr ...

    Installing the camshaft and rocker arms
    1. Lubricate: Rocker arms Rocker arm shafts 2. Lubricate: Camshaft 3. Install: Camshaft "1" NOTE: Make sure that the camshaft projections "a" and hole "b" are positioned as shown in the illustration. 4. Install: Rocker arms Rocker arm shafts "1" NOTE: Make ...

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