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Yamaha Motorsports

2008 Grizzly 400 Auto. 4x4

With push-button 4WD, four-wheel engine braking and more, you'll have plenty of tools to get the job done.

Grizzly 400 Auto. 4x4 Blue
Grizzly 400 Auto. 4x4 Blue

Grizzly 400 Auto. 4x4 Camo
Grizzly 400 Auto. 4x4 Camo

Grizzly 400 Auto. 4x4 Green
Grizzly 400 Auto. 4x4 Green

Grizzly 400 Auto. 4x4 Red
Grizzly 400 Auto. 4x4 Red

Key Features:

  • Independent rear suspension for excellent terrainability and all-day comfort.
  • Grizzly 400 Automatic 4x4 has many of the same great features as big brother Grizzly 450, including four-wheel independent suspension, in a lighter package powered by a fuel-efficient liquid-cooled engine.
  • Fully automatic Ultramatic® transmission is the most advanced drive system in ATV-ing. An automatic centrifugal clutch maintains constant belt tension for reduced belt wear and front-/rear-wheel downhill engine braking.
  • On-Command® In/Out 4WD feature lets you switch between 2WD and 4WD with the simple push of a button.
  • 10.8 inches of ground clearance and high-impact plastic skid plate improve maneuverability and undercarriage protection.
  • Fully independent long-travel four-wheel suspension features double-wishbone suspension front and rear with five-way preload-adjustable shocks for maximum control and comfort over rough terrain.


  • 401cc liquid-cooled, SOHC four-stroke single is the best-performing engine in its class.
  • Semi-oval slide 33mm BSR Mikuni carburetor and high-output DC-CDI ignition deliver incredible throttle response and engine performance at all rpm.
  • Pushbutton electric starting backed up by auxiliary recoil starter.
  • Stainless steel muffler and header design provides superior power characteristics, exhaust sound and durability.
  • Left-side–mounted F/N/R shift lever.
  • Large-capacity aluminum radiator provides maximum cooling efficiency and is positioned high in frame for optimal protection.
  • Compact engine design features a 45-degree cylinder angle for maximum ground clearance and lower seat height for quick, responsive steering and agility.
  • Gear-driven crankshaft balancer and rubber-damper engine mounts reduce vibration.
  • Fully sealed drive case keeps out water and debris to minimize belt slippage.
  • Specially designed drive system air intake vent prevents overheating and keeps water and mud from entering drive case.
  • Easy-access, tool-free air filter box.


  • Lightweight CAD-designed chassis features outstanding durability with superior rigidity for class-leading agility and handling.
  • Light steering and a class-leading turning radius combine for increased comfort and incredible maneuverability—even in 4WD.
  • Low seat height creates enhanced handling.
  • Fully independent four-wheel suspension features a double-wishbone suspension front and rear delivering 6.3 inches and 7.1 inches of travel, respectively, with five-way preload-adjustable shocks to ensure maximum tire contact—and comfort.
  • Large-diameter ventilated hydraulic front disc brakes deliver tremendous stopping power in a variety of conditions.
  • Direct front shaft drive eliminates U-joint for greater durability and more efficient power transfer when engaged in 4WD.
  • Heavy-duty composite front carry bar and CV joint guards help prevent damage to boot covers and won’t dent or rust.

Additional Features:

  • Steel cargo racks with special, extra-durable wrinkle paint finish feature a combined cargo capacity of 264 pounds (88 front, 176 rear).
  • Standard, center-mounted trailer hitch can hook up over 1,100 pounds of payload.
  • Available in four colors, including Realtree® AP High Definition™ Camouflage for true hunting performance.
  • Recessed, water-resistant, automotive-type DC power outlet handles wide range of accessories.
    Water-resistant, large-capacity underseat storage box provides added convenience.
  • Speedometer with tripmeter adds greater versatility and allows rider to keep track of engine maintenance intervals.
  • Plush, specially designed seat widely contoured for incomparable rider comfort.
  • Wide, fully integrated floorboards keep rider’s feet dry and feature serrated footpegs for extra grip in wet conditions.
  • Large front and rear fenders with inner guards offer excellent mud/splash protection.
  • Maintenance-free 18-amp-hour battery provides reliable, cold-weather starting power.
  • Easy-access, underseat marine-spec electrical components ensure maximum protection from the elements.
  • Dual, bright multi-reflector 30-watt halogen bulb headlights with high and low beams.
    Built in Newnan, GA, USA.



  • Type 401cc, 4-stroke, liquid-cooled single; SOHC
  • Bore x Stroke 84.5mm x 71.5mm
  • Compression Ratio 10.5:1
  • Carburetion Mikuni 33mm BSR
  • Ignition DC-CDI
  • Starting System Electric w/auxiliary pull
  • Transmission Yamaha Ultramatic® V-belt with front-/rear-wheel engine braking/F, N, R
  • Engine Braking Front & rear wheel
  • Drive Train Yamaha On-Command® pushbutton; 2WD, 4WD; shaft drive


  • Suspension/Front Independent double wishbone; 5-way preload adjustment, 6.3-in travel
  • Suspension/Rear Independent double wishbone; 5-way preload adjustment, 7.1-in travel
  • Brakes/Front Dual hydraulic discs
  • Brakes/Rear Hydraulic disc
  • Tires/Front AT25x8-12
  • Tires/Rear AT25x10-12


  • Length 78.5 x 43.0 x 44.1 in
  • Seat Height 32.7 in
  • Wheelbase 48.5 in
  • Turning Radius 118 in
  • Ground Clearance 10.8 in
  • Fuel Capacity 4.0 gal
  • Dry Weight 578 lb
  • Rack Capacity 88 lb Fr./176 lb Rr.
  • Towing Capacity 1,102 lb.


  • Instrumentation Speedometer, odometer & fuel guage
  • Lighting Dual 30W Krypton multi-reflector headlights & 21/5W brakelight

MSRP* $5,799 (Steel Blue) Available from September 2007
$5,799 (Hunter Green) Available from September 2007
$5,799 (Red) Available from September 2007
$6,149 (Realtree® AP HD™ Camouflage) Available from August 2007

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