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2012 Yamaha Big Bear 400 4x4 IRS


 
  Review 
 
   

The name of this Yamaha ATV is the Big Bear 400 and it’s as imposing as its name suggests, and it also provides a lot of useful features for hard core ATV riders.

Aesthetically, the ATV has flat-style handlebars that help provide light steering effort and great rider comfort while the large front and rear fenders offer excellent mud and splash protection. The ATV also has a water-resistant, large-capacity underseat storage box; a specially designed, thickly padded seat for rider comfort; rugged, serrated footrests that have excellent grip; and a huge set of 25" ITP Mud Lite tires.

Growling inside the Big Bear 400’s special compact frame design is a simple yet powerful 386cc air and oil-cooled, SOHC engine that breathes through a heated, semi-oval slide 33 mm BSR Mikuni carburetor, providing seamless throttle response and excellent all-weather performance. The engine is mated to a constant-mesh five-speed transmission that comes with an automatic clutch, a reverse gear, and a super-low stump-pulling first gear. Complimenting the ATV’s sturdy steel frame is an independent rear suspension that offers maximum ground clearance, excellent terrainability, and all-day comfort riders require for their vehicle. The ATV also has a sealed wet brake out back to provide impressive stopping power even in tough conditions.

One prominent feature of the Big Bear 400 is its class-exclusive, three-position On-Command In/Out 4WD feature which lets you switch between different sorts of drive systems, including 2WD, limited-slip 4WD, and fully locked differential 4WD, all by just a simple push of a button.

Find out more about the Yamaha Big Bear 400 after the jump.


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.
  • DC-CDI ignition system ensures dependable starting and puts out consistent spark at all rpm for optimal engine performance.
  • Large-capacity oil cooler with cooling fan helps maximize engine efficiency, even under heavy loads.
  • Stainless steel muffler and header provide superior power characteristics, exhaust sound and unmatched durability.
  • Tool-free, easy-access air filter box.
  • Automatic cam chain tensioner reduces engine maintenance and helps extend engine life.

Chassis and Suspension

  • Special compact frame design uses fewer components to reduce weight and provide lighter steering, a tighter turning radius, and superior durability.
  • Class-leading turning radius provides maximum maneuverability on tight trails and while working with heavy equipment.
  • Independent double-wishbone front suspension with five-way preload-adjustable shocks and 5.8 inches of travel.
  • Independent rear suspension with five-way preload adjustment and 7.6 inches of travel provides excellent handling and all day comfort.
  • On-Command drive selection with Diff. Lock lets you access full power from 4WD locked.
  • Low seat height for great handling.
  • Plenty of ground clearance and a high mount air intake makes this machine ready for muddy conditions.
  • Large-diameter ventilated hydraulic front disc brakes and a sealed rear wet brake provide plenty of stopping power in a variety of conditions.
  • Reliable, low-maintenance front and rear shaft drive.
  • Specially designed A-arms with removable ball joints provide smooth operation and outstanding reliability.
  • 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.
  • Speedometer with odometer/tripmeter adds greater versatility and allows rider to keep track of engine maintenance intervals.
  • Standard center-mounted trailer hitch can hook up more than 1100 pounds of payload.
  • Full floorboards, lots of ground clearance, and a high-mount air intake are ready for mud.
  • Flat-style handlebars help provide light steering effort and great rider comfort.
  • Large front and rear fenders with inner splash guards offer excellent mud and splash protection.
  • Water-resistant, large-capacity underseat storage box provides added convenience.
  • Heavy-duty, full-coverage A-arm and CV joint boot protectors help prevent damage to boot covers.
  • Specially designed, thickly padded seat is widely contoured for incomparable rider comfort.
  • Large-capacity, 4-gallon fuel tank has a built-in gauge. Mud and water-resistant automotive-type DC power outlet powers a wide range of accessories.
  • Rugged, serrated footrests provide excellent grip and rider comfort with superb durability.
  • Maintenance-free 18-amp-hour battery provides extra starting power.
  • Underseat marine-spec electrical components ensure maximum protection from the elements and easy access.
  • Bright multireflector 30-watt headlights feature wide positioning to maximize low-light and nighttime visibility.
  • Easy-to-use, handlebar-mounted parking brake and choke lever.
  • Assembled in Newnan, GA, U.S.A.

Specifications

ModelYFM40FBBL; YFM40FBBGR; YFM40FBHB
Engine Type386cc, 4-stroke, air/oil-cooled single; SOHC
Bore x Stroke83.0 x 71.5mm
Compression Ratio8.6:1
Fuel DeliveryMikuni 33mm BSR
IgnitionDC-CDI
Starting SystemElectric w/auxiliary pull
Transmission5-speed w/reverse; automatic clutch; front- and rear-wheel engine braking
Drive TrainYamaha On-Command pushbutton; 3-way locking differential; 2WD, 4WD, locked 4WD; shaft drive
Suspension/FrontIndependent double wishbone; 5-way preload adjustment, 5.8-in travel
Suspension/RearIndependent double wishbone; 5-way preload adjustment, 7.6-in travel
Brakes/FrontDual hydraulic disc
Brake/RearSealed oil bathed, multi disc
Tire/FrontAT25 x 8-12 ITP Mud Lite
Tire/RearAT25 x 10-12 ITP Mud Lite
L x W x H79.4 x 43.9 x 46.7 in
Seat Height35.2 in
Wheelbase48.4 in
Turning Radius126 in
Ground Clearance10.5 in
Fuel Capacity4.0 gal
Wet Weight628 lb
Rack Capacity88 lb Fr./176 lb Rr.
Towing Capacity1102 lb
InstrumentationSpeedometer, odometer, fuel gauge
LightingDual 30W Krypton multireflector headlights & 21W/5W brakelight
ColorSteel Blue; Hunter Green; Realtree AP Camouflage
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Picture Gallery (28)
  • yamaha big bear 400 4x4 irs 2
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Picture Gallery (28)

Year:2012
Engine:air and oil-cooled, SOHC engine
Transmission:constant-mesh five-speed transmissio
Displacement:386 L


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