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2010 Yamaha Big Bear 400
2010 Yamaha Big Bear 400

2010 Yamaha Big Bear 400
2010 Yamaha Big Bear 400

2010 Yamaha Big Bear 400
2010 Yamaha Big Bear 400

2010 Yamaha Big Bear 400
2010 Yamaha Big Bear 400

– 2010 Yamaha Big Bear 400

2010 Yamaha Big Bear 400

Reliable and rugged for riders who prefer shifting, now with ITP MudLite tires, IRS and sealed wet brake.

With a semi-automatic transmission, On-Command with Diff Lock, ITP Mud Lites and a sealed wet brake, this 2010 Yamaha Bear was built for serious work on a serious terrain.

With a semi-automatic transmission, On-Command with Diff Lock, ITP Mud Lites and a sealed wet brake, this Bear was built for serious work on serious terrain.

When you’ve got a job to do, regardless of the conditions, you can’t afford compromise. The Big Bear 400 is a no-compromise purpose built ATV.



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.
” Independent rear suspension offers excellent terrainability and all-day comfort.
” Class-exclusive, pushbutton On-Command® with Diff. Lock makes switching from 2WD to 4WD to 4WD Diff Lock a snap.
” Constant-mesh five-speed transmission with automatic clutch, reverse and super-low stump-pulling first gear means this is one hard-working ATV.
” Sealed wet brake out back provides long-lasting, consistent stopping power in even the harshest conditions.
” Full floorboards and high ground clearance keep the rider high and as dry as possible.
” Pushbutton electric starting in any gear is backed up by an auxiliary recoil starter.


” 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.


” 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 rear suspension provides excellent handling and all day comfort.
” High-tech sealed wet brake provides consistent, long-lasting braking performance in hostile environments.
” 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.
” Independent double-wishbone front suspension with five-way preload-adjustable shocks and 5.8 inches of travel.
” 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.
” Huge 25×8-12 front and 25×10-12 rear ITP® Mud Lite tires further boost ground clearance while providing great handling and traction.
” 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 900 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.
” Built in Newnan, GA, USA.



2010 Yamaha Big Bear 400 – USA Specifications
MSRP* $6,649 (Realtree AP Camo) Available from September 2009
$6,299 (Hunter Green) Available from November 2009
$6,299 (Steel Blue) Available from November 2009

Type 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

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 discs

Brakes/Rear Sealed oil bathed, multi disc

Tires/Front AT25 x 8-12 ITP® Mud Lite

Tires/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 904 lb

Instrumentation Speedometer, odometer & fuel gauge

Lighting Dual 30W Krypton multireflector headlights & 21/5W brakelight

Warranty 6 Month (Limited Factory Warranty)




2010 Yamaha Big Bear 400 – Canada Specifications
Canadian MSRP* $8,899 CDN

Engine 4-Stroke, SOHC, Single, Air/Oil Cooler w/ Fan
Displacement 386 cc
Bore and Stroke 83mm x 71.5mm
Compression Ratio 8.6 : 1
Carburetion Mikuni 33mm BSR
Ignition DC – CDI
Starting Electric w/ Auxiliary Pull
Lubrication wet sump
Transmission 5-Speed, Automatic Clutch w/ Reverse
Final Drive On-command push button 2WD / 4WD / 4WD diff. lock, shaft drive

Suspension (Front) Independent Double Wishbone, w/ 5-way Preload Adjustment.
Suspension (Rear) Independent Double Wishbone, w/ 5-way Preload Adjustment.
Brakes (Front) Dual Hydraulic Disc
Brakes (Rear) Fully Sealed , Oil Bath, Multi Disc
Tires (Front) ITP Mud Lite 25×8-12
Tires (Rear) ITP Mud Lite 25×10-12

Length 2016 mm (79.4 in)
Width 1116 mm (43.9 in)
Height 1187 mm (46.7 in)
Wheelbase 1230 mm (48.4 in)
Ground Clearance 267mm(10.5 in)
Seat Height 895 mm (35.2 in)
Dry Weight 265 kg (593.0 lb)
Wet Weight 285 kg (628 lb) – ready to ride full of fuel and oil
Fuel Capacity 15 litres
Towing Capacity 410 kg (904 lb)
Colour(s) Dark Blue
Dark Green




ATV Safety Notes

– ATVs with engines 70 to 90cc are recommended for use only by riders 12 years and older and always with adult super vision. ATVs with engines 90cc or greater are recommended for use only by riders ages 16 years and older.

– Yamaha recommends that all ATV riders take an approved training course. For safety and training information, see your dealer or call the ATV Safety Institute at 1-800-887-2887.

– ATVs can be hazardous to operate. For your safety, always avoid paved surfaces. Never ride on public roads. Always wear a helmet, eye protection and protective clothing.

Never carry passengers. Never engage in stunt riding. Riding and alcohol/drugs don’t mix. Avoid excessive speed. And be particularly careful on difficult terrain. There are few joys in life equal to the free-spirited thrill and experience of ATV riding. And that’s why it’s important for all of us to do
our part as responsible riders. By following logical, common-sense rules, we can maintain season after season of unparalleled enjoyment of our sport.

– Please remember to “tread lightly.” Always ride in a responsible manner, respecting the environment as well as all state and local laws. The riders in this brochure are professionals; don’t attempt to emulate them. Prices and specifications subject to change without notice. Please read your Owner’s Manual and all labels before operation. All ATVs come with a six-month Limited Factory Warranty. See your dealer for details.