Yamaha TZ250M1 Owner's Service Manual page 279

[Front]
Tire
brand
*3.10/4.80 R17
DUNLOP KR106
120/70 R17
DUNLOP MR977
*Designated tire
[Rear]
Tire
brand
*165/55 R17
DUNLOP KR108
165/50 R17
DUNLOP KR244
*Designated tire
Tire circumference
About 1,875 mm (73.8 in)
About 1,885 mm (74.2 in)
Tire circumference
About 1,975 mm (77.8 in)
About 1,957 mm (77.0 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 298.5 mm (11.8 in)
About 300 mm (11.8 in)
Tire radius
About 314.5 mm (12.4 in)
About 311.5 mm (12.3 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
13 mm (0.51 in)
11.5 mm (0.45 in)
Seat height
24 mm (0.94 in)
25.5 mm (1.00 in)