| Yamaha's profilation of this bike | 
  | Reliable and rugged for riders who prefer shifting, now with ITP MudLite tires, IRS and sealed wet brake.Class-exclusive, pushbutton On-Command® with Diff. Lock makes switching from 2WD to 4WD to 4WD Diff Lock a snap. | 
    
        | General information | 
  
    | Motorcycle name | Yamaha Big Bear 400 4x4 IRS | 
    | Model year | 2010 | 
    | Category | ATV | 
| Price as new | US$ 6649.   MSRP depends on country, taxes, accessories, etc. | 
    | Rating | 3.3   Check out the detailed rating of reliability, maintenance costs, value for money, etc. Compare with any other motorcycle. | 
    
        | Engine and transmission | 
  
    | Displacement | 421.0 ccm (25.69 cubic inches) | 
    | Engine type | Single cylinder, four-stroke | 
    | Compression | 8.6:1 | 
    | Bore x stroke | 83.0 x 71.5 mm (3.3 x 2.8 inches) | 
    | Fuel system | Carburettor. Mikuni® 33mm BSR | 
    | Fuel control | Single Overhead Cams (SOHC) | 
    | Cooling system | Oil & air | 
    | Gearbox | 5-speed | 
    
        | Chassis, suspension, brakes and wheels | 
  
    | Front suspension | Independent double wishbone | 
    | Front wheel travel | 147 mm (5.8 inches) | 
    | Rear suspension | Independent double wishbone | 
    | Rear wheel travel | 193 mm (7.6 inches) | 
    | Front tire | 25/8-AT12 | 
    | Rear tire | 25/10-AT12 | 
    | Front brakes | Double disc | 
    | Rear brakes | Double disc | 
    
        | Physical measures and capacities | 
  
    | Weight incl. oil, gas, etc | 284.9 kg (628.0 pounds) | 
    | Seat height | 894 mm (35.2 inches) If adjustable, lowest setting. | 
    | Overall height | 1186 mm (46.7 inches) | 
    | Overall length | 2017 mm (79.4 inches) | 
    | Overall width | 1115 mm (43.9 inches) | 
    | Ground clearance | 267 mm (10.5 inches) | 
    | Wheelbase | 1229 mm (48.4 inches) | 
    | Fuel capacity | 15.14 litres (4.00 US gallons) | 
    
        | Other specifications | 
  
    | Color options | Realtree AP Camo, Hunter Green, Steel Blue | 
    | Starter | Electric | 
| Update specs | Report missing specs or required updates. | 
    
        | Further information | 
  | Insurance costs | Compare US insurance quotes from the nation's top providers. | 
| Maintenance | Find parts, fluids. filters, maintenance tools and service manuals at Amazon.com. | 
| Ask questions | Join the 10 Yamaha Big Bear 400 4x4 IRS discussion group or the general Yamaha discussion group. | 
| Related bikes | List related bikes for comparison of specs. | 
    
        | Compare with another motorcycle | 
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