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.

  • 2012 Yamaha Big Bear 400 4x4 IRS
  • Year:
  • Make:
  • Model:
  • Engine:
    air and oil-cooled, SOHC engine
  • Transmission:
    constant-mesh five-speed transmissio
  • Displacement:
    386 L


2012 Yamaha Big Bear 400 4x4 IRS High Resolution Exterior
- image 421984
  • 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

2012 Yamaha Big Bear 400 4x4 IRS High Resolution Exterior
- image 422010
  • 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

2012 Yamaha Big Bear 400 4x4 IRS High Resolution Exterior
- image 421987

— 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.


2012 Yamaha Big Bear 400 4x4 IRS High Resolution Exterior
- image 421991
Engine Type 386cc, 4-stroke, air/oil-cooled single; SOHC
Bore x Stroke 83.0 x 71.5mm
Compression Ratio 8.6:1
Fuel Delivery Mikuni 33mm BSR
Ignition DC-CDI
Starting System Electric w/auxiliary pull
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
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
Brakes/Front Dual hydraulic disc
Brake/Rear Sealed oil bathed, multi disc
Tire/Front AT25 x 8-12 ITP Mud Lite
Tire/Rear AT25 x 10-12 ITP Mud Lite
L x W x H 79.4 x 43.9 x 46.7 in
Seat Height 35.2 in
Wheelbase 48.4 in
Turning Radius 126 in
Ground Clearance 10.5 in
Fuel Capacity 4.0 gal
Wet Weight 628 lb
Rack Capacity 88 lb Fr./176 lb Rr.
Towing Capacity 1102 lb
Instrumentation Speedometer, odometer, fuel gauge
Lighting Dual 30W Krypton multireflector
headlights & 21W/5W brakelight
Color Steel Blue; Hunter Green;
Realtree AP Camouflage
What do you think?
Show Comments
Motorcycle Finder: