Yamaha YZF-R125 Service Manual: Checking the coolant level

1. Stand the vehicle on a level surface.

NOTE:

  • Place the vehicle on a suitable stand.
  • Make sure the vehicle is upright.

2. Check:

Coolant level The coolant level should be between the maximum level mark "a" and minimum level mark "b".

Below the minimum level mark →  Add the recommended coolant to the proper level.

NOTE:

To access the coolant reservoir cap "1", remove the right side cover. Refer to "GENERAL CHASSIS" on page 4-1.

Checking the coolant level


CAUTION:
  • Adding water instead of coolant lowers the antifreeze content of the coolant. If water is used instead of coolant, check and, if necessary, correct the antifreeze concentration of the coolant.
  • Use only distilled water. However, if distilled water is not available, soft water may be used.

3. Start the engine, warm it up for several minutes, and then turn it off.

4. Check:

  • Coolant level

NOTE:

Before checking the coolant level, wait a few minutes until it settles.

    Checking the exhaust system
    1. Check: Exhaust assembly "1" Cracks/damage → Replace. Exhaust pipe gasket "2" Exhaust gas leaks → Replace. 2. Check: Tightening torques of the exhaust pipe nuts "3" an ...

    Checking the cooling system
    1. Remove: Side covers Upper side cowlings Refer to "GENERAL CHASSIS" on page 4-1. 2. Check: Radiator "1" Radiator inlet hose "2" Radiator outlet hose "3" Coolant reservoir hose ...

    Other materials:

    Installing the exhaust assembly
    1. Install: Exhaust assembly "1" Exhaust pipe nuts "2" Exhaust assembly bolts "3" "4" NOTE: Do not fully tighten the nuts and bolts. 2. Tighten: Exhaust pipe nuts "2" Exhaust assembly bolt "4" Exhaust assembly bolt "3" ...

    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) Checking the air induction system Air injection The air induction system burns unburned exhaust gases b ...

    Installing the clutch
    1. Install: Conical spring washer "1" NOTE: Install the conical spring washer as shown in the illustration. 2. Install: Clutch housing Thrust washer "1" NOTE: Be sure to install the thrust washer so that its sharp edge "a" is facing away from the clutch boss. 3. Instal ...

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