Yamaha YZ85 2021 Owner's Manual page 54

Periodic maintenance and adjustment
NOTICE
 Make sure the bead stopper is
tightened. A loose bead stopper
will cause the tire to slip off the
rim if tire pressure is too low.
 Make sure the valve stem is po-
sitioned straight. A tilted valve
stem indicates that the tire has
slipped from its original position
on the rim. Rotate the tire so
that the valve stem is positioned
straight.
7
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 re-
place the tire immediately.
Minimum tire tread depth (front and
rear):
4.0 mm (0.16 in)
Tire information
This model is equipped with tube tires.
Tires age, even if they have not been
used or have only been used occasion-
ally. Cracking of the tread and sidewall
rubber, sometimes accompanied by
ECA15582
carcass deformation, is an evidence of
ageing. Old and aged tires shall be
checked by tire specialists to ascertain
their suitability for further use.
WARNING
The front and rear tires should be of
the same make and design, other-
wise the handling characteristics of
the vehicle may be different, which
could lead to an accident.
After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha.
Front tire:
Size:
70/100-17 40M (YZ85N)
70/100-19 42M (YZ85LWN)
Manufacturer/model:
DUNLOP/MX3SF
Rear tire:
Size:
90/100-14 49M (YZ85N)
90/100-16 52M (YZ85LWN)
Manufacturer/model:
DUNLOP/MX3S
7-15
WARNING
 Have a Yamaha dealer replace
excessively worn tires. Operat-
ing the motorcycle with exces-
EWA10462 sively worn tires decreases
riding stability and can lead to
loss of control.
 The replacement of all wheel-
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience.
 It is not recommended to patch
a punctured tube. If unavoid-
able, however, patch the tube
very carefully and replace it as
soon as possible with a high-
quality product.
EWA14391