Cooling system

Checking the radiator

~1min read

1. Check:

Radiator fins obstruction clean.


Apply compressed air to the rear of the radiator.

Damage repair or replace.


NOTE:

Straighten any flattened fins with a thin, flat-head screwdriver.

Checking the radiator

2. Check:

  • Radiator hoses Cracks/damage Replace.

3. Measure:

  • Radiator cap opening pressure Below the specified pressure
    Replace the radiator cap.

a. Install the radiator cap tester "1" and radiator cap tester adapter "2" to the radiator cap "3".


Checking the radiator

b. Apply the specified pressure for ten seconds and make sure there is no drop in pressure.

4. Check:

  • Radiator fan Damage Replace.

Malfunction Check and repair.


Refer to "COOLING SYSTEM" on page 8-25.

Test yourself

A quick Yamaha YZF-R125 quiz: every answer comes with an explanation and a link to the manual page.