Yamaha YZF-R125 Service Manual: Removing the fuel tank

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

2. Remove:

  • Fuel hose connector cover "1"

3. Disconnect:

  • Fuel hose "2"
CAUTION:
  • Be sure to disconnect the fuel hose by hand. Do not forcefully disconnect the hose with tools.
  • 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.
  • Do not disconnect the fuel hose from the fuel hose connector. Disconnect the connector from the fuel pump.

NOTE:

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

Removing the fuel tank


4. Remove:

  • Fuel tank

Checking the fuel pump body

1. Check:

Fuel pump body Obstruction Clean.


Cracks/damage Replace the fuel tank.


    Fuel tank
    ...

    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 ...

    Other materials:

    Faulty clutch
    Clutch slips 1. Clutch Improperly assembled clutch Improperly adjusted clutch cable Loose or fatigued clutch spring Worn friction plate Worn clutch plate 2. Engine oil Incorrect oil level Incorrect oil viscosity (low) Deteriorated oil Clutch drags 1. Clutch Unevenly t ...

    Checking the cylinder head
    1. Eliminate: Combustion chamber carbon deposits (with a rounded scraper) NOTE: Do not use a sharp instrument to avoid damaging or scratching: Spark plug bore threads Valve seats 2. Check: Cylinder head Damage/scratches   Replace. Cylinder head water jacket Min ...

    Checking the piston rings
    1. Measure: Piston ring side clearance Out of specification Replace the piston and piston rings as a set. NOTE: Before measuring the piston ring side clearance, eliminate any carbon deposits from the piston ring grooves and piston rings. 2. Install: Piston ring (into the cylind ...

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