Yamaha BIG BEAR PROFESSIONAL 400 YFM400FPT Owner's Manual page 374

Model
Gear Ratio:
38/13 × 20/24 × 22/20 (2.680)
1st
34/18 × 20/24 × 22/20 (1.731)
2nd
30/22 × 20/24 × 22/20 (1.249)
3rd
26/25 × 20/24 × 22/20 (0.953)
4th
24/29 × 20/24 × 22/20 (0.759)
5th
Reverse
Chassis:
Frame type
Caster angle
Trail
Tire:
Type
Size
Brake:
Front brake
Rear brake
High range
36/13 × 27/16 (4.673)
(front)
(rear)
type
operation
type
operation
10-5
YFM400FP/YFM400FW
Low range
38/13 × 20/24 × 27/15 (4.384)
34/18 × 20/24 × 27/15 (2.832)
30/22 × 20/24 × 27/15 (2.044)
26/25 × 20/24 × 27/15 (1.560)
24/29 × 20/24 × 27/15 (1.242)
Steel tube frame
2.5°
15.0 mm
Tubeless
AT25 × 8-12
AT25 × 10-12
Dual disc brake
Right hand operation
Drum brake
Left hand and right foot operation