2008 Yamaha Big Bear 400 IRS 4×4

2008 Yamaha Big Bear 400 IRS 4×4

Once again a day in the mud is a blast with the redesigned 2008 Big Bear 400 IRS 4×4. With 4WD capabilities, independent suspension, and semi-auto transmission sealed in all of the right places, it is definitely going to be a muddy season.

The 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. It has a class-leading low-end and midrange power to tackle the hardest chores and toughest trails.

A constant-mesh five-speed transmission with automatic clutch, reverse and super-low stump-pulling first gear means this is one hard-working ATV. Don’t be mistaken, though- it’s actually easy to operate and handle. The Class-exclusive, pushbutton On-Command® with Diff Lock makes switching from 2WD to 4WD to 4WD Diff Lock a snap.

The special, compact frame design uses fewer components to reduce weight and provide lighter steering. This beast has a top of the class turning radius for maximum maneuverability on tight trails or for working with heavy equipment. The rear independent double wishbone suspension has a 5-way preload adjustment set of shocks with 7.6-in of travel. The front Independent double-wishbone suspension has 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. Topping off the mudder’s delight is a set of giant 25×8-12 front and 25×10-12 rear ITP Mud Lite tires giving a whopping 10.5 inches of travel.

For all of those long days in the muddy swamp, one may be concerned about the maintenance on the machine. Yamaha has made it easier for the owner by having an easy-access, tool-free air filter box, and an automatic cam chain tensioner that reduces engine maintenance and helps extend engine life. The Mud-/water-resistant automotive-type DC power outlet powers a wide range of accessories that are needed after a long day out in the mud.

Additional comfort features include full floorboards and front and rear fenders with inner splash guards that offer excellent in-mud and splash protection to help keep the rider as dry as possible. The specially designed, thickly padded seat is widely contoured for excellent comfort. The large-capacity, water-resistant, underseat storage box provides added convenience in keeping valuables dry. This is the mudder’s ultimate dream quad, so hurry up and get muddy.

• 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 for 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.
• Number-one-selling aftermarket ITP Mud Lite tires make the Big Bear 400 an excellent mud machine.
• Pushbutton electric starting in any gear is backed up by an auxiliary recoil starter

• Engine Type: 386cc, 4-stroke, air-/oil-cooled single; SOHC
• Bore x Stroke: 83.0mm x 71.5mm
• Compression Ratio: 8.6:1
• Carburetion: 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
• Engine Braking: Front and rear wheel
• 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:
• Tires/Front: AT25x8-12 ITP Mud Lite
• Tires/Rear: AT25x10-12 ITP Mud Lite
• Length: 79.4 inches
• Width: 43.9 inches
• Height: 46.7 inches
• Seat Height: 35.2 in
• Wheelbase: 48.4 in
• Turning Radius: 126 in
• Ground Clearance: 10.5 in
• Fuel Capacity: 4.0 gal
• Dry Weight: 593 lbs
• Rack Capacity: 88 lb Fr./176 lb Rr.
• Towing Capacity: 904 lb
• Instrumentation: Speedometer, odometer & fuel gauge
• Lighting: Dual 30W Krypton multi-reflector headlights & 21/5W brakelight
• MSRP: ,699 (Steel Blue) Available from June 2007 ,699 (Hunter Green) Available from June 2007 ,699 (Red) Available from June 2007 ,049 (Realtree® AP HD™ Camouflage) Available from August 2007