Yamaha Big Bear 400
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| Yamaha Big Bear 400 | |
| Manufacturer | |
|---|---|
| Also called | Big Bear 400 4x4 IRS |
| Production | 2009 - 2012 |
| Class | ATV |
| Engine | 4-stroke, Air-/oil-cooled Single, SOHC |
| Bore / Stroke | 83.8mm x 83.8mm |
| Compression ratio | 8.6:1 |
| Ignition | dc-cdi |
| Transmission | Gear box: 5-speed, reverse Final Drive: 2WD, 4WD, locked 4WD; shaft drive |
| Suspension | Front: Independent double wishbone; 5.8-in travel Rear: Independent double wishbone; 7.6-in travel |
| Brakes | Front: Dual Hydraulic Discs Rear: Sealed oil bathed, multi disc |
| Front Tire | AT25 x 8-12 ITP Mud Lite |
| Rear Tire | AT25 x 10-12 ITP Mud Lite |
| Wheelbase | 48.39 inches (1229 mm) |
| Length | 79.41 inches (2017 mm) |
| Width | 43.9 inches (1115 mm) |
| Height | 46.69 inches (1186 mm) |
| Seat Height | 35.2 inches (894 mm) |
| Weight | 593.04 pounds (269.0 Kg) (dry), 285.0 kg (wet) |
| Recommended Oil | Yamalube 10w-40 |
| Fuel Capacity | 1.06 Gallon (4.00 Liters) |
| Manuals | Service Manual |
The Yamaha Big Bear 400 4x4 IRS was a 4-stroke, Air-/oil-cooled Single, SOHC ATV produced by Yamaha between 2009 and 2012.
Engine[edit | edit source]
The engine was a oil & air cooled 4-stroke, Air-/oil-cooled Single, SOHC. A 83.8mm bore x 83.8mm stroke result in a displacement of just 386.0 cubic centimeters. Fuel was supplied via a single overhead cams (sohc).
Drive[edit | edit source]
The bike has a 5-speed, reverse transmission. Power was moderated via the Automatic clutch.
Chassis[edit | edit source]
It came with a AT25 x 8-12 ITP Mud Lite front tire and a AT25 x 10-12 ITP Mud Lite rear tire. Stopping was achieved via Dual Hydraulic Discs in the front and a Sealed oil bathed, multi disc in the rear. The front suspension was a Independent double wishbone; 5.8-in travel while the rear was equipped with a Independent double wishbone; 7.6-in travel. The Big Bear 400 4x4 IRS was fitted with a 1.06 Gallon (4.00 Liters) fuel tank. The bike weighed just 593.04 pounds (269.0 Kg). The wheelbase was 48.39 inches (1229 mm) long.
2009 Yamaha Big Bear 400[edit | edit source]
Hop aboard the 2008 Yamaha Big Bear 400 and hit the trail... or start your first chores around the ranch: you're riding a very serious off-road machine which is hard to stop, no matter how rough the terrain is. This ATV is really easy to drive thanks to its semi-automatic transmission: the gearbox has a 5-speed architecture, but the clutch is automatic, making everything smooth and fun.
This ATV also boasts the Yamaha on-command 3-way differential lock which helps the rider get a better grip on slippery terrain or steep slopes. The mid-size chassis provides plenty of room, but at the same time allows the riders to load this quad in the back of a casual pickup truck, for easy transportation to remote locations.
The 2008 Big Bear 400 retains the serious racking capacity and can tow heavy loads, being a dependable partner in completing the toughest tasks and being a fun machine for weekend trail fun, too.
2010 Yamaha Big Bear 400[edit | edit source]
The 2009 Yamaha Big Bear 400 is the definition of ATV versatility, packing a lot of punch and convenience thanks to its 5-speed/ reverse gearbox with automatic clutch. Now it's easier to adapt the power delivery to any scenario, inluding the use of the on-command 3-way differential lock which helps the rider get a better grip on slippery terrain or steep slopes.
This quad retains the impressive racking capacity and can tow qute heavy loads, being a dependable partner in completing the toughest tasks and being a fun machine for weekend trail fun, too. The built-in winch mounts make installing this valuable upgrade easy and quick and you'll be up an running in no time. Add in long-travel independent suspensions and engine braking and there you have it, Mr. Quad Versatility.
2011 Yamaha Big Bear 400 4x4 IRS[edit | edit source]
Thanks to its triple-mode traction, the 2010 Big Bear 400 4x4 IRS can easily tackle pretty much any obstacles: it comes with a casual 2WD rear traction mode, and a dual-range 4WD one, ready to take you to places where even the human foot will be in difficulty.
The 2010 Yamaha Big Bear 400 4x4 IRS sports an usual 4WD drive and a limited-slip differential mode, essential for difficult situations such as very steep gradients. With these modes available at the push of a button and the ease of use provided by the automatic transmission, this ATV is really rider-friendly.
Luggage racks can accommodate tools and all the needed gear for a weekend in the wilderness: the 2010 Yamaha Big Bear 400 4x4 IRS is equally suitable for both work and play, and thanks to its huge ground clearance, you can be sure there's little to stop it in its way.
2012 Yamaha Big Bear 400 4x4 IRS[edit | edit source]
The 2011 Yamaha Big Bear 400 4x4 IRS is a dependable ATV which can easily take you to places where even the human foot will be in difficulty. Thanks to its triple-mode traction, the 2011 Big Bear 400 4x4 IRS can easily tackle pretty much any obstacles: it comes with a casual 2WD rear traction mode, and a dual-range 4WD one.
Besides the usual 4WD drive, the 2011 Yamaha Big Bear 400 4x4 IRS offers a limited-slip differential mode, essential for difficult situations such as very steep gradients. With these modes available at the push of a button and the ease of use provided by the automatic transmission, this ATV is really rider-friendly.
Luggage racks can accommodate tools and all the needed gear for a weekend in the wilderness: the 2011 Yamaha Big Bear 400 4x4 IRS is equally suitable for both work and play, and thanks to its huge ground clearance, you can be sure there's little to stop it in its way.