Yamaha YBR125ED Owner's Manual page 36

WARNING:
After extensive tests, the tires listed below have been
approved by Yanaha 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 Yamaha is used on this
motorcycle.
Manufacturer
Front
PIRELLI
PIRELLI
Rear
Minimum tire tread depth
(from and rear)
Size
Type
2.75-18
42P MT 39
90/90-18
57P MT 15
0,8 mm (0.0315 in)
WARNING:
1. It is dangerous to ride with a worn-out tire. When
the tire tread begin to show signs of wear, replace
the tire immediately. Brakes, tires and related wheel
parts should be left to a Yamaha dealer.
2. 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.
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