Yamaha YZF-R125 Owners Manual: Tires

To maximize the performance, durability, and safe operation of your motorcycle, note the following points regarding the specified tires.

Tire air pressure

The tire air pressure should be checked and, if necessary, adjusted before each ride.

WARNING
Operation of this vehicle with improper tire pressure may cause severe injury or death from loss of control.

  • The tire air pressure must be checked and adjusted on cold tires (i.e., when the temperature of the tires equals the ambient temperature).

  • The tire air pressure must be adjusted in accordance with the riding speed and with the total weight of rider, passenger, cargo, and accessories approved for this model.

Tire air pressure (measured on cold tires):

0-90 kg (0-198 lb):

Front:

175 kPa (1.75 kgf/cm², 25 psi)

Rear:

200 kPa (2.00 kgf/cm², 29 psi)

90-185 kg (198-408 lb):

Front:

175 kPa (1.75 kgf/cm², 25 psi)

Rear:

225 kPa (2.25 kgf/cm², 33 psi)

Maximum load*:

185 kg (408 lb)

* Total weight of rider, passenger, cargo and accessories

WARNING
Never overload your vehicle. Operation of an overloaded vehicle could cause an accident.

Tire inspection


  1. Tire sidewall
  2. Tire tread depth

The tires must be checked before each ride. If the center tread depth reaches the specified limit, if the tire has a nail or glass fragments in it, or if the sidewall is cracked, have a Yamaha dealer replace the tire immediately.

Minimum tire tread depth (front and rear):

1.6 mm (0.06 in)

TIP
The tire tread depth limits may differ from country to country. Always comply with the local regulations.

WARNING


  • Have a Yamaha dealer replace excessively worn tires. Besides being illegal, operating the vehicle with excessively worn tires decreases riding stability and can lead to loss of control.

  • The replacement of all wheel and brake related parts, including the tires, should be left to a Yamaha dealer, who has the necessary professional knowledge and experience.

Tire information


  1. Tire air valve
  2. Tire air valve core
  3. Tire air valve cap with seal

This motorcycle is equipped with cast wheels and tubeless tires with valves.

WARNING


  • The front and rear tires should be of the same make and design, otherwise the handling characteristics of the motorcycle may be different, which could lead to an accident.

  • Always make sure that the valve caps are securely installed to prevent air pressure leakage.

  • Use only the tire valves and valve cores listed below to avoid tire deflation during a ride.

After extensive tests, only the tires listed below have been approved for this model by Yamaha Motor Co., Ltd.

Front tire:

Size:

100/80-17 M/C 52H

Manufacturer/model:

PIRELLI/SPORT DEMON MICHELIN/PILOT SPORTY

Tire air valve:

TR412

Valve core:

V3002 (original)

Rear tire:

Size:

130/70-17 M/C 62H

Manufacturer/model:

PIRELLI/SPORT DEMON MICHELIN/PILOT SPORTY

Tire air valve:

TR412

Valve core:

V3002 (original)

WARNING
This motorcycle is fitted with superhigh- speed tires. Note the following points in order to make the most efficient use of these tires.

  • Use only the specified replacement tires. Other tires may run the danger of bursting at super high speeds.

  • Brand-new tires can have a relatively poor grip on certain road surfaces until they have been "broken in". Therefore, it is advisable before doing any highspeed riding to ride conservatively for approximately 100 km (60 mi) after installing a new tire.

  • The tires must be warmed up before a high-speed run.

  • Always adjust the tire air pressure according to the operating conditions.

    Valve clearance
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    Cast wheels
    To maximize the performance, durability, and safe operation of your vehicle, note the following points regarding the specified wheels. The wheel rims should be checked for cracks, bends o ...

    Other materials:

    Checking the front brake lever free play
    Checking the front brake lever free play Brake lever free play The brake lever free play should measure 2.0-5.0 mm (0.08-0.20 in) as shown. Periodically check the brake lever free play and, if necessary, have a Yamaha dealer check the brake system. WARNING An incorrect brake le ...

    Checking the valve seats
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    Checking the front brake disc
    1. Remove: Front wheel Refer to "FRONT WHEEL" on page 4-6. 2. Check: Brake disc Damage/galling Replace. 3. Measure: Brake disc deflection Out of specification Correct the brake disc deflection or replace the brake disc. a. Place the vehicle on a suitable stand ...

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