Yamaha YFM250 Owner's Manual page 129

Gear ratio:
1st:
37/13 (2.846)
2nd:
33/18 (1.833)
3rd:
29/21 (1.381)
4th:
27/24 (1.125)
5th:
28/29 (0.966)
Chassis:
Frame type:
Steel tube frame
Caster angle:
6.0 °
Trail:
23.0 mm (0.91 in)
Front tire:
Type:
Tubeless
Size:
AT20 x 7-10
Manufacturer/model:
DURO/DI-K102
Rear tire:
Type:
Tubeless
Size:
AT19 x 10-9
Manufacturer/model:
DURO/DI-K502A
Loading:
Maximum loading limit:
100.0 kg (220 lb)
(Total weight of rider, cargo, accessories, and tongue)
Tire air pressure (measured on cold tires):
Recommended:
Front:
27.5 kPa (0.275 kgf/cm², 4.0 psi)
Rear:
27.5 kPa (0.275 kgf/cm², 4.0 psi)
Minimum:
Front:
24.5 kPa (0.245 kgf/cm², 3.6 psi)
Rear:
24.5 kPa (0.245 kgf/cm², 3.6 psi)
Front wheel:
Wheel type:
Panel wheel
Rim size:
10 x 5.5AT
Rear wheel:
Wheel type:
Panel wheel
Rim size:
9 x 8.0AT
Front brake:
Type:
Disc brake
Operation:
Right hand operation
10-3
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