Yamaha YZF-R125 Quiz
Engine

Checking the valve springs

In this manual: Engine
General information — 15Specifications — 14Periodic checks and adjustments — 41Chassis — 67Engine — 76Cooling system — 12Fuel system — 10Electrical system — 61Troubleshooting — 13
~1min read

The following procedure applies to all of the valve springs.

1. Measure:

  • Valve spring free length "a" Out of specification Replace the valve spring.
Checking the valve springs

2. Measure:

  • Compressed valve spring force "a" Out of specification Replace the valve spring.
Checking the valve springs

b. Installed length

3. Measure:

  • Valve spring tilt "a" Out of specification Replace the
    valve spring.
Checking the valve springs

Test yourself

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