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 clutch boss
    1. Check: Clutch boss splines Damage/pitting/wear Replace the clutch boss. NOTE: Pitting on the clutch boss splines will cause erratic clutch operation. Checking the pressure plate 1. Check: Pressure plate Cracks/damage Replace. Checking the clutch push lever and short clutch push ...

    Main switch/steering lock
    Main switch/steering lock The main switch/steering lock controls the ignition and lighting systems, and is used to lock the steering. The various positions are described below. ON All electrical circuits are supplied with power, the meter lighting, taillight, license plate light and ...

    Checking the starter motor
    1. Check: Commutator Dirt Clean with 600 grit sandpaper. 2. Measure: Commutator diameter "a" Out of specification Replace the starter motor. 3. Measure: Mica undercut "a" Out of specification Scrape the mica to the proper measurement with a hacksaw blade ...

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