Yamaha TZ125M1 Owner's Service Manual page 249

[Front]
Tire
brand
95/70R17
DUNLOP KR149
[Rear]
Tire
brand
125/55R17
DUNLOP KR133
Tire circumference
About 1,810 mm (71.3 in)
Tire circumference
About 1,869 mm (73.6 in)
7-15
SETTING
EC72M001
Tire and machine's posture
If a non-designated tire is used, the difference
in radius between the front and the rear tire
may affect the machine's posture.
To keep the machine in a proper posture,
adjust the front fork top end or seat height.
Basically, with a larger radius tire, lower the
machine's posture and vice versa.
Tire radius
About 288 mm (11.3 in)
Tire radius
About 297 mm (11.7 in)
Example:
If the front tire radius is 1 mm (0.04 in) larger,
lower the front posture by 1 mm (0.04 in) by
increasiry the front fork top end a by 1 mm
(0.04 in). If the rear tire radius is 2 mm (0.08 in)
smaller, raise the rear posture by 2 mm (0.08
in) by decreasiry the adjuster set length b by
1 mm (0.04 in).
NOTE:
• Find the tire radius by calculating the mea-
sured circumference of the tire.
• A change of 1 mm (0.04 in) in the front fork
top end results in a change of about 1 mm
(0.04 in) in the front posture. A change of 1
mm (0.04 in) in the adjuster set length results
in a change of about 2 mm (0.08 in) in the
rear posture.
TUN
Front fork top end
18 mm (0.71 in)
Seat height
19 mm (0.75 in)