Yamaha BIG BEAR PROFESSIONAL 400 YFM400FPT Owner's Manual page 373

Model
Fuel:
Type
Fuel tank capacity
Fuel reserve amount
Carburetor:
Type / manufacturer
Spark plug:
Type (Manufacturer)
Spark plug gap
Clutch type:
Transmission:
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Transmission type
Operation
YFM400FP/YFM400FW
For Europe: Regular unleaded gasoline only with a
research octane number of 91 or higher
For Australia: Unleaded gasoline only
13.5 L
1.3 L
BTM32SH/MIKUNI
DR8EA (NGK)
0.6–0.7 mm
Wet, centrifugal automatic
Spur gear
76/24 (3.167)
Shaft drive
×
24/18 33/09 (4.889)
Constant mesh 5-speed
Left foot operation
10-4