Yamaha YZF-R125 Service Manual: Changing the coolant

1. Remove:

  • Lower side cowlings Refer to "GENERAL CHASSIS" on page 4-1.

2. Remove:

  • Radiator cap "1"

Changing the coolant


WARNING

A hot radiator is under pressure. Therefore, do not remove the radiator cap when the engine is hot. Scalding hot fluid and steam may be blown out, which could cause serious injury.

When the engine has cooled, open the radiator cap as follows: Place a thick rag or a towel over the radiator cap and slowly turn the radiator cap counterclockwise toward the detent to allow any residual pressure to escape. When the hissing sound has stopped, press down on the radiator cap and turn it counterclockwise to remove.

3. Remove:

  • Coolant drain bolt "1" (along with the copper washer)

Changing the coolant


4. Drain:

  • Coolant (from the engine and radiator)

5. Disconnect:

  • Coolant reservoir hose "1"

6. Remove:

  • Coolant reservoir cap "2"

Changing the coolant


7. Drain:

  • Coolant (from the coolant reservoir)

8. Connect:

  • Coolant reservoir hose

9. Install:

  • Coolant drain bolt (along with the copper washer )

10.Fill:

  • Cooling system (with the specified amount of the recommended coolant)

Handling notes for coolant Coolant is potentially harmful and should be handled with special care.

WARNING
  • If coolant splashes in your eyes, thoroughly wash them with water and consult a doctor.
  • If coolant splashes on your clothes, quickly wash it away with water and then with soap and water.
  • If coolant is swallowed, induce vomiting and get immediate medical attention.
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.
  • If coolant comes into contact with painted surfaces, immediately wash them with water.
  • Do not mix different types of antifreeze.

11.Install:

  • Radiator cap

12.Fill:

  • Coolant reservoir (with the recommended coolant to the maximum level mark "a")

13.Install:

  • Coolant reservoir cap

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

15.Check:

  • Coolant level Refer to "CHECKING THE COOLANT LEVEL" on page 3-15.

NOTE:

Before checking the coolant level, wait a few minutes until the coolant has settled.

16.Install:

  • Lower side cowlings Refer to "GENERAL CHASSIS" on page 4-1.
    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 ...

    Chassis
    ...

    Other materials:

    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 ...

    Ignition circuit cut-off system
    The ignition circuit cut-off system (comprising the sidestand switch, clutch switch and neutral switch) has the following functions. It prevents starting when the transmission is in gear and the sidestand is up, but the clutch lever is not pulled. It prevents starting when the t ...

    Protective apparel
    The majority of fatalities from motorcycle accidents are the result of head injuries. The use of a safety helmet is the single most critical factor in the prevention or reduction of head injuries. Always wear an approved helmet. Wear a face shield or goggles. Wind in your unprotecte ...

    2026 Copyright www.yam-r125.net |