2012 Yamaha Big Bear 400 4x4 IRS
Here's mud in your eye.
Featuring a sealed wet brake for incredible durability and reliability in even the sloppiest conditions, the legendary Big Bear 400 4x4 IRS features mid-size chassis, torquey powerful engine, 5-speed automatic clutch gearbox with reverse, independent rear suspension, On-Command 2WD / 4WD and so much more.
Pricing/Color Information
Features
All
Key Features: Potent, 386cc air/oil-cooled, SOHC four-stroke single delivers reliable, class-leading low-end and midrange power to tackle the hardest chores and toughest trails.
Key Features: Independent rear suspension offers maximum ground clearance, excellent terrainability and all-day comfort.
Key Features: Class-exclusive, three-position On-Command® In/Out 4WD feature lets you switch between 2WD, limited-slip 4WD and fully locked differential 4WD—all with the simple push of a button.
Key Features: Constant-mesh five-speed transmission with automatic clutch, reverse and super-low stump-pulling first gear means this is one hard-working ATV.
Key Features: Sealed wet brake out back provides long-lasting, consistent stopping power in even the harshest conditions.
Key Features: Full floorboards and high ground clearance keep the rider high and as dry as possible.
Key Features: Pushbutton electric starting in any gear is backed up by an auxiliary recoil starter.
Key Features: Huge 25x8-12 front and 25x10-12 rear ITP® Mud Lite tires further boost ground clearance while providing great handling and traction.
Engine: Simple yet powerful 386cc air/oil-cooled, SOHC engine inhales through a heated, semi-oval slide 33mm BSR Mikuni® carburetor for seamless throttle response and excellent all-weather performance.
Engine: DC-CDI ignition system ensures dependable starting and puts out consistent spark at all rpm for optimal engine performance.
Engine: Large-capacity oil cooler with cooling fan helps maximize engine efficiency, even under heavy loads.
Engine: Stainless steel muffler and header provide superior power characteristics, exhaust sound and unmatched durability.
Engine: Tool-free, easy-access air filter box.
Engine: Automatic cam chain tensioner reduces engine maintenance and helps extend engine life.
Chassis/Suspension: Special compact frame design uses fewer components to reduce weight and provide lighter steering, a tighter turning radius and superior durability.
Chassis/Suspension: Class-leading turning radius provides maximum maneuverability on tight trails and while working with heavy equipment.
Chassis/Suspension: Independent double-wishbone front suspension with five-way preload-adjustable shocks and 5.8 inches of travel.
Chassis/Suspension: Independent rear suspension with five-way preload adjustment and 7.6 inches of travel provides excellent handling and all day comfort.
Chassis/Suspension: On-Command® drive selection with Diff. Lock lets you access full power from 4WD locked.
Chassis/Suspension: Low seat height for great handling.
Chassis/Suspension: Plenty of ground clearance and a high mount air intake makes this machine ready for muddy conditions.
Chassis/Suspension: Large-diameter ventilated hydraulic front disc brakes and a sealed rear wet brake provide plenty of stopping power in a variety of conditions.
Chassis/Suspension: Reliable, low-maintenance front and rear shaft drive.
Chassis/Suspension: Specially designed A-arms with removable ball joints provide smooth operation and outstanding reliability.
Chassis/Suspension: Built-in winch mounts.
Additional Features: Wrinkle-finish cargo racks are super-durable and can pack a class-leading total of 264 pounds (88 front, 176 rear) of payload.
Additional Features: Speedometer with odometer/tripmeter adds greater versatility and allows rider to keep track of engine maintenance intervals.
Additional Features: Standard center-mounted trailer hitch can hook up more than 1100 pounds of payload.
Additional Features: Full floorboards, lots of ground clearance and a high-mount air intake are ready for mud.
Additional Features: Flat-style handlebars help provide light steering effort and great rider comfort.
Additional Features: Large front and rear fenders with inner splash guards offer excellent mud and splash protection.
Additional Features: Water-resistant, large-capacity underseat storage box provides added convenience.
Additional Features: Heavy-duty, full-coverage A-arm and CV joint boot protectors help prevent damage to boot covers.
Additional Features: Specially designed, thickly padded seat is widely contoured for incomparable rider comfort.
Additional Features: Large-capacity, 4-gallon fuel tank has a built-in gauge.
Additional Features: Mud and water-resistant automotive-type DC power outlet powers a wide range of accessories.
Additional Features: Rugged, serrated footrests provide excellent grip and rider comfort with superb durability.
Additional Features: Maintenance-free 18-amp-hour battery provides extra starting power.
Additional Features: Underseat marine-spec electrical components ensure maximum protection from the elements and easy access.
Additional Features: Bright multireflector 30-watt headlights feature wide positioning to maximize low-light and nighttime visibility.
Additional Features: Easy-to-use, handlebar-mounted parking brake and choke lever.
Additional Features: Assembled in Newnan, GA, U.S.A.
2012 Yamaha Big Bear 400 4x4 IRS
Specifications
Engine
- Starting System
- Electric w/auxiliary pull
- Engine
- 386cc, 4-stroke, air-/oil-cooled single; SOHC
- Bore x Stroke
- 83.0mm x 71.5mm
- Compression Ratio
- 8.6:1
- Fuel Delivery
- Mikuni® 33mm BSR
- Fuel Capacity
- 4.0 gal
Transmission
- Ignition
- DC-CDI
- Transmission
- 5-speed w/reverse; automatic clutch; front- and rear-wheel engine braking
- Drive Train
- Yamaha On-Command® pushbutton; 3-way locking differential; 2WD, 4WD, locked 4WD; shaft drive
Chassis
- Suspension Front
- Independent double wishbone; 5-way preload adjustment, 5.8-in travel
- Suspension Rear
- Independent double wishbone; 5-way preload adjustment, 7.6-in travel
- Brake Front
- Dual hydraulic discs
- Brake Rear
- Sealed oil bathed, multi disc
- Tires Front
- AT25 x 8-12 ITP® Mud Lite
- Tires Rear
- AT25 x 10-12 ITP® Mud Lite
- Turning Radius
- 126 in
Dimensions
- Ground Clearance
- 10.5 in
- Dimensions (LxWxH)
- 79.4 x 43.9 x 46.7 in
- Seat Height
- 35.2 in
- Wheelbase
- 48.4 in
- Wet Weight
- 628 lb
- Rack Capacity
- 88 lb Fr./176 lb Rr.
General Information
- Towing Capacity
- 1102 lb
- Instruments
- Speedometer, odometer & fuel gauge
- Lighting
- Dual 30W Krypton multireflector headlights & 21/5W brakelight
- Warranty
- 6 Month (Limited Factory Warranty)




