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

Yamaha Big Bear 400 4x4 IRS Specs

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 equiped 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  . Regarding the chassis characteristics, responsible for road holding, handling behaviour and ride confort, the Yamaha Big Bear 400 4x4 IRS have a  frame with front suspension being Independent double wishbone and in the rear suspension it is equiped 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 rear. 

Yamaha Big Bear 400 4x4 IRS General Information

Brand Yamaha 
Model Yamaha Big Bear 400 4x4 IRS 
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  
Driveline  

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  
Emissions  

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

Ignition Type  
Electrical Details  
Starter Type Electric 
Instruments  
Lights