Yamaha YZF-R125 Service Manual: Checking the fuel pressure

Yamaha YZF-R125 Service Manual / Fuel system / Fuel tank / Checking the fuel pressure

1. Check:

  • Pressure regulator operation

a. Remove the fuel hose connector cover "1" and disconnect the fuel hose "2" from the fuel pump.

CAUTION:

Although the fuel has been removed from the fuel tank, be careful when removing the fuel hose, since there may be fuel remaining in it.

NOTE:

Before removing the hose, place a few rags in the area under where it will be removed.

Checking the fuel pressure


b. Connect the pressure gauge "3" and fuel pressure adapter "4".


Checking the fuel pressure


c. Start the engine.

d. Measure the fuel pressure.


Faulty Replace the fuel tank (with fuel pump).

e. Connect the fuel hose and install the fuel hose connector cover.

Refer to "INSTALLING THE FUEL HOSE" on page 7-2.

    Installing the fuel hose
    1. Install: Fuel hose Fuel hose connector cover CAUTION:When installing the fuel hose, make sure that it is securely connected, and that the fuel hose connector cover is in t ...

    Throttle body
    ...

    Other materials:

    Checking the timing chain and timing chain guide
    1. Check: Timing chain Damage/stiffness Replace the timing chain and camshaft sprocket as a set. 2. Check: Timing chain guide (intake side) Damage/wear Replace. Checking the oil strainer 1. Check: Oil strainer Damage   Replace. Contaminants Clean with solvent. ...

    Adjusting the brake pedal free play
    Adjusting the brake pedal free play Brake pedal free play The brake pedal free play should measure 3.5-4.5 mm (0.14-0.18 in) as shown. Periodically check the brake pedal free play and, if necessary, have a Yamaha dealer adjust it. WARNING An incorrect brake pedal free play in ...

    Checking the cylinder and piston
    1. Check: Piston wall Cylinder wall Vertical scratches Replace the cylinder, and replace the piston and piston rings as a set. 2. Measure: Piston-to-cylinder clearance a. Measure cylinder bore "C" with the cylinder bore gauge. NOTE: Measure cylinder bore "C" by takin ...

    2022 Copyright www.yam-r125.net |