Yamaha YZF-R125 Service Manual: Checking the tires

The following procedure applies to both of the tires.

1. Check:

Tire pressure Out of specification Regulate.


Checking the tires


WARNING
  • The tire pressure should only be checked and regulated when the tire temperature equals the ambient air temperature.
  • The tire pressure must be adjusted according to the total weight (including cargo, rider, passenger and accessories) and the anticipated riding speed.
  • Operation of an overloaded vehicle could cause tire damage, an accident or an injury.

    NEVER OVERLOAD THE VEHICLE.


WARNING

It is dangerous to ride with a worn-out tire.

When the tire tread reaches the wear limit, replace the tire immediately.

2. Check:

Tire surfaces Damage/wear Replace the tire.


Checking the tires


1. Tire tread depth

2. Side wall

3. Wear indicator


WARNING
  • Do not use a tubeless tire on a wheel designed only for tube tires to avoid tire failure and personal injury from sudden deflation.
  • When using a tube tire, be sure to install the correct tube.
  • Always replace a new tube tire and a new tube as a set.
  • To avoid pinching the tube, make sure the wheel rim band and tube are centered in the wheel groove.
  • Patching a punctured tube is not recommended.

    If it is absolutely necessary to do so, use great care and replace the tube as soon as possible with a good quality replacement.

Checking the tires


A. Tire

B. Wheel


WARNING

After extensive tests, the tires listed below have been approved by MBK Industrie for this model. The front and rear tires should always be by the same manufacturer and of the same design. No guarantee concerning handling characteristics can be given if a tire combination other than one approved by MBK Industrie is used on this vehicle.


WARNING

New tires have a relatively low grip on the road surface until they have been slightly worn. Therefore, approximately 100 km should be traveled at normal speed before any high-speed riding is done.

NOTE:

For tires with a direction of rotation mark "1":

  • Install the tire with the mark pointing in the direction of wheel rotation.
  • Align the mark "2" with the valve installation point.

Checking the tires


    Checking the front fork
    1. Stand the vehicle on a level surface. WARNINGSecurely support the vehicle so that there is no danger of it falling over. 2. Check: Inner tube Damage/scratches Replace. ...

    Checking the wheels
    The following procedure applies to both of the wheels. 1. Check: Wheel Damage/out-of-round → Replace. WARNINGNever attempt to make any repairs to the wheel. NOTE: After a t ...

    Other materials:

    Removing the front brake caliper
    NOTE: Before disassembling the brake caliper, drain the brake fluid from the entire brake system. 1. Remove: Brake hose union bolt "1" Copper washers "2" Brake hose "3" NOTE: Put the end of the brake hose into a container and pump out the brake fluid carefully. ...

    Checking the ignition spark gap
    1. Check: Ignition spark gap Out of specification Perform the ignition system troubleshooting, starting with step 5. Refer to "TROUBLESHOOTING" on page 8-3. NOTE: If the ignition spark gap is within specification, the ignition system circuit is operating normally. a. Disconnect the spa ...

    Checking the water pump
    1. Check: Water pump housing cover Water pump housing Cracks/damage Replace. Impeller shaft Cracks/damage/wear Replace. Bearing Rough movement Replace. Radiator outlet hose Cracks/damage Replace. ...

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