- Cooling system (with the specified amount of the recommended coolant)
Refer to "Changing the coolant".
2. Check:
- Cooling system
Leaks → Repair or replace any faulty part.
a. Attach the radiator cap tester "1" and radiator cap tester adapter "2" to the radiator.
Radiator cap tester 90890-03125. Radiator pressure tester YU-24460-01. Radiator cap tester adapter 90890-01352. Radiator pressure tester adapter YU-33984.
![](https://motoinstruction.ru/img/yamaha/20/126816.jpg)
b. Apply 137.3 kPa (1.37 kgf/cm², 19.9 psi) of pressure.
c. Measure the indicated pressure with the gauge.
3. Measure:
- Radiator cap opening pressure
Below the specified pressure → Replace the radiator cap.
Refer to "Checking the radiator".