Yamaha BIGBEAR YFM400NM Owner's Manual page 152

Transmission:
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Transmission type
E
Operation
Gear raito:
Reverse gear
Chassis:
Frame type
Caster angle
Trail
Tire:
Type
Size: Front
Size: Rear
Brake:
Front brake type
Operation
Rear brake type
Operation
MODEL
1st
2nd
3rd
4th
5th
Spur gear
76/24 (3.167)
Shaft drive
28/24 × 24/18 × 33/09 (5.703)
Constant mesh 5-speed forward, 1-speed reverse
Left foot operation
40/12 (3.333)
34/18 (1.889)
30/22 (1.364)
25/26 (0.961)
19/27 (0.703)
22/17 × 35/15 (3.020)
Steel tube
°
4
21 mm (0.83 in)
Tubeless
AT25 × 8-12
AT25 × 11-10
Single disk brake
Right hand operation
Drum brake
Left hand and right foot operation
10-3
YFM400N