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.
| 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

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
Tire information

This motorcycle is equipped with cast wheels and tubeless tires with valves.
WARNING
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.
Valve clearance
Cast wheelsChecking the timing chain and timing chain guide
1. Check:
Timing chain
Damage/stiffness Replace the
timing
chain and camshaft sprocket as a set.
2. Check:
Timing chain guide (intake side)
Damage/wear Replace.
Checking the oil strainer
1. Check:
Oil strainer
Damage Replace.
Contaminants Clean with solvent.
...
Assembling the water pump
1. Install:
Water pump seal "1"
(into the water pump housing "2")
CAUTION:Never lubricate the water pump seal
surface
with oil or grease.
NOTE:
Install the water pump seal with the special
tools.
Install the water pump seal with the special
tools to the specifi ...
Introduction
Welcome to the Yamaha world of motorcycling!
As the owner of the YZF-R125, you are benefiting from Yamaha's vast
experience and newest technology regarding the design
and manufacture of high-quality products, which have earned Yamaha a reputation
for dependability.
Please take the time to re ...