Yamaha YFM125GZ Owner's Manual page 120

Transmission oil:
Quantity:
0.6 L (0.63 US qt, 0.53 Imp.qt)
1
Air filter:
Air filter element:
2
Wet element
Fuel:
3
Recommended fuel:
Unleaded gasoline only
4
Fuel tank capacity:
7.0 L (1.85 US gal, 1.54 Imp.gal)
Fuel reserve amount:
5
1.3 L (0.34 US gal, 0.29 Imp.gal)
Carburetor:
6
Type × quantity:
VM18SH x 1
7
Spark plug (s):
Manufacturer/model:
8
NGK/CR7HSA
Spark plug gap:
9 0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:
10
Dry, centrifugal automatic
Transmission:
11
Primary reduction system:
Helical gear/spur gear
Primary reduction ratio:
43/14 × 40/17 (7.226)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
32/12 (2.666)
Transmission type:
V-belt automatic
Operation:
Centrifugal automatic type
Reverse gear:
49/14 × 49/15 × 40/17 (26.902)
Chassis:
Frame type:
Steel tube frame
Caster angle:
6.0 °
Trail:
15.0 mm (0.59 in)
Front tire:
Type:
Tubeless
Size:
AT20 x 7-8
Manufacturer/model:
DUNLOP/KT536A
Rear tire:
Type:
Tubeless
Size:
AT22 x 10-8
Manufacturer/model:
DUNLOP/KT537A
10-2