Yamaha YZF-R125 Service Manual: Removing the throttle body

1. Extract the fuel in the fuel tank through the fuel tank filler hole with a pump.

2. Disconnect:

  • Fuel hose
WARNING

Cover the fuel hose connections with a cloth when disconnecting them. Residual pressure in the fuel lines could cause fuel to spurt out when removing the hoses.

NOTE:

  • To remove the fuel hose from the fuel injector, slide the fuel hose connector cover "1" on the end of the hose in the direction of the arrow shown, press the two buttons "2" on the sides of the connector, and then remove the hose.
  • Remove the fuel hose manually without using any tools.
  • Before removing the hose, place a few rags in the area under where it will be removed.

Removing the throttle body


3. Remove:

  • Throttle body
CAUTION:

Do not remove the throttle body sensor assembly "1" from the throttle body.

Removing the throttle body


Checking the fuel injector

1. Check:

  • Fuel injector Damage Replace.

    Throttle body
    ...

    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 ...

    Other materials:

    Checking the diode
    1. Check: Diode Out of specification Replace. NOTE: The pocket tester or the analog pocket tester readings are shown in the following table. a. Disconnect the diode from the wire harness. b. Connect the pocket tester ( × 1) to the diode terminals as shown. c. Check the diod ...

    Introduction
    WARNINGDisc brake components rarely require disassembly. Therefore, always follow these preventive measures: Never disassemble brake components unless absolutely necessary. If any connection on the hydraulic brake system is disconnected, the entire brake sy ...

    Checking the valve seats
    The following procedure applies to all of the valves and valve seats. 1. Eliminate: Carbon deposits (from the valve face and valve seat) 2. Check: Valve seat Pitting/wear Replace the cylinder head. 3. Measure: Valve seat width C "a" Out of specification Replace the ...

    2019 Copyright www.yam-r125.net |