Motorcycles Specs > Yamaha > Yamaha Big Bear 400 4x4 IRS

Yamaha Big Bear 400 4x4 IRS Specs

Yamaha Big Bear 400 4x4 IRS image
The Yamaha Big Bear 400 4x4 IRS model is a ATV bike manufactured by Yamaha . In this version sold from year 2010 , the dry weight is  and it is equipped with a Single cylinder, four-stroke motor. The engine produces a maximum peak output power of  and a maximum torque of  . With this drive-train, the Yamaha Big Bear 400 4x4 IRS is capable of reaching a maximum top speed of  . On the topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, the Yamaha Big Bear 400 4x4 IRS has a  frame with front suspension being Independent double wishbone and at the rear, it is equipped with Independent double wishbone . Stock tire sizes are 25/8-AT12 on the front, and 25/10-AT12 on the rear. As for stopping power, the Yamaha Big Bear 400 4x4 IRS braking system includes Double disc size  at the front and Double disc size  at the back. 

Yamaha Big Bear 400 4x4 IRS General Information

Brand Yamaha 
Model Yamaha Big Bear 400 4x4 IRS 
Start year 2010 
Year 2010 
Category ATV 
Factory Warranty (Years / miles)

Yamaha Big Bear 400 4x4 IRS Dimensions, Aerodynamics and weight

Frame type
Seat details
Wheelbase 1,229 mm (48.4 inches) 
Length 2,017 mm (79.4 inches) 
Width 1,115 mm (43.9 inches) 
Height 1,186 mm (46.7 inches) 
Seat Height 894 mm (35.2 inches) If adjustable, lowest setting. 
Alternate Seat Height
Ground Clearance 267 mm (10.5 inches) 
Trail size
Wheels details
Front Tyres - Rims dimensions 25/8-AT12 
Rear Tyres - Rims dimensions 25/10-AT12 
Front brakes Double disc 
Rear brakes Double disc 
Front Brakes Dimensions - Disc Dimensions
Rear Brakes Dimensions - Disc Dimensions
Curb Weight (including fluids) 284.9 kg (628.0 pounds) 
Dry Weight
Front Percentage of Weight
Rear Percentage of Weight
Weight-Power Output Ratio :
Fuel Tank Capacity 15.14 litres (4.00 gallons) 
Reserve Fuel Capacity
Carrying Details and Capacity
Front Suspension Independent double wishbone 
Front Suspension Travel 147 mm (5.8 inches) 
Rear Suspension Independent double wishbone 
Rear Suspension Travel 193 mm (7.6 inches) 

Yamaha Big Bear 400 4x4 IRS Engine and Transmission Technical Data

Engine type - Number of cylinders Single cylinder, four-stroke 
Engine details
Fuel system
Engine size - Displacement - Engine capacity 421.00 ccm (25.69 cubic inches) 
Bore x Stroke 83.0 x 71.5 mm (3.3 x 2.8 inches) 
Compression Ratio 8.6:1 
Number of valves per cylinder
Camshaft Valvetrain Configuration SOHC 
Maximum power - Output - Horsepower
Maximum torque
Engine Maximum RPM
Cooling system Oil & air 
Lubrication system
Engine oil capacity
Exhaust system
Gearbox 5-speed 
Transmission type, final drive ratio
Clutch type

Yamaha Big Bear 400 4x4 IRS Performance

Top Speed
Acceleration 0 to 100 km/h (0 to 62 mph)
Acceleration 0 to 400m (1/4 mile)
Recuperation 60 to 140 km/h in highest gear
Fuel Consumption - MPG - Economy - Efficiency
CO2 emissions

Yamaha Big Bear 400 4x4 IRS Electrical Systems, Ignition and Equipment

Ignition Type
Electrical Details
Starter Type Electric 
How tall (seat height) is a Yamaha Big Bear 400 4x4 IRS?
The Yamaha Big Bear 400 4x4 IRS seat height is 894 mm (35.2 inches) If adjustable, lowest setting.

How many gears does a Yamaha Big Bear 400 4x4 IRS have?
The Yamaha Big Bear 400 4x4 IRS have 5 gears.