Yamaha YFM50R Owner's Manual page 108

Engine oil quantity:
Periodic oil change:
0.80 L (0.85 US qt) (0.70 Imp.qt)
1
Final gear oil:
Type:
2
SAE80 API GL-4 Hypoid gear oil
Quantity:
3
0.12 L (0.13 US qt) (0.11 Imp.qt)
Air filter:
4
Air filter element:
Wet element
Fuel:
5
Recommended fuel:
Regular unleaded gasoline only (EUR)
6
Unleaded gasoline only (AUS)(NZL)
Fuel tank capacity:
7
6.8 L (1.80 US gal) (1.50 Imp.gal)
Fuel reserve amount:
8
0.9 L (0.24 US gal) (0.20 Imp.gal)
Carburetor:
9 Manufacturer:
MIKUNI
Type x quantity:
10
VM16SH x 1
Spark plug (s):
11
Manufacturer/model:
NGK/CR7HSA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:
Wet, multiple-disc automatic
Transmission:
Primary reduction system:
Spur gear
Primary reduction ratio:
65/20 (3.250)
Secondary reduction system:
Shaft drive
Secondary reduction ratio:
19/18 × 34/10 (3.588)
Transmission type:
Constant mesh 1-speed
Operation:
Left hand operation
1st:
38/14 (2.714)
Chassis:
Frame type:
Steel tube frame
Caster angle:
1.0 °
Trail:
3.4 mm (0.13 in)
Front tire:
Type:
Tubeless
Size:
AT16 x 7-7
10-2