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Yamaha Motorsports

2008 Grizzly 660 Auto. 4x4

Proven tough, the Grizzly 660 offers awesome big-bore utility ATV performance.

Grizzly 660 Auto. 4x4 Blue
Grizzly 660 Auto. 4x4 Blue

Grizzly 660 Auto. 4x4 Camo
Grizzly 660 Auto. 4x4 Camo

Grizzly 660 Auto. 4x4 Green
Grizzly 660 Auto. 4x4 Green

Grizzly 660 Auto. 4x4 Red
Grizzly 660 Auto. 4x4 Red

Key Features:

  • Highly evolved, 660cc liquid-cooled, four-stroke five-valve engine and light weight add up to one of the best power-to-weight ratios of any utility model in the industry.
  • Industry-exclusive, 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, unmatched durability and confident all-wheel downhill engine braking.
  • Industry-exclusive three-position On-Command® In/Out 4WD feature lets you switch between 2WD, limited-slip 4WD and fully locked differential 4WD—all with the simple push of a button.
  • Fully independent long-travel four-wheel suspension with five-way preload-adjustable shocks and 11.8 inches of ground clearance provides maximum control and comfort over rough terrain.
  • Trick digital instrument panel boasts a multifunction LCD display with speedometer, odometer, dual tripmeters, hourmeter, 4WD status, transmission position, clock and fuel gauge.
  • All-wheel independent suspension, a thick, cushy seat and light handling make for a supremely comfortable ride.
  • Lightweight yet super-strong CAD-designed steel frame results in the lightest weight in the class—600 pounds—which results in outstanding handling and performance.


  • Yamaha’s patented five-valve cylinder design produces a potent combination of low-rev torque, right-now throttle response and high horsepower.
  • 42mm Mikuni BSR carburetor and high-output DC-CDI ignition system ensure incredible throttle response and engine performance.
  • Pushbutton electric starting with auxiliary recoil starter and auto decompression cam for “easy-pull” backup starter convenience.
  • Dual-range (Hi/Lo) drive with reverse taps into massive pulling power in low and superior performance in high.
  • Specially designed full stainless steel exhaust system features aluminum heat shields and a screen-type spark arrestor for great power with minimum noise output.
  • Override button allows engine to make maximum rpm in full Diff Lock mode.
  • Compact engine design features a 45-degree cylinder angle for maximum ground clearance and lower seat height—for quick steering and maneuverability.
  • Gear-driven crankshaft balancer shaft and rubber-damper engine mounts reduce vibration.
  • Large-capacity aluminum radiator with fan-assist delivers maximum cooling efficiency and is positioned high in the frame for optimal protection.
  • Low-maintenance front shaft drive features a gear case and electronic servo-activated 2WD/4WD/Diff Lock via the On-Command® system.
  • Direct rear shaft drive eliminates the U-joint for greater durability and more efficient power transfer at all rpm.
  • Sealed drive case keeps out water and debris to help prevent belt from slipping.
  • Easy-access, tool-free air filter box.


  • Large-diameter ventilated hydraulic front disc brakes and shaft-mounted hydraulic rear disc system ensure outstanding stopping power in a variety of conditions.
  • Light, responsive steering and a class-leading turning radius combine for increased comfort and incredible maneuverability — even in 4WD.
  • 7.1 inches front suspension travel and 9.5 inches out back, controlled by five-way preload adjustable shocks, provide a controlled, comfortable ride whatever the load or trail conditions.
  • 11.8 inches of ground clearance and full-length composite skid plate deliver maximum underbelly protection while enhancing terrainability.
  • 34.6-inch seat height creates a low center of gravity for improved handling and maneuverability.
  • 25x8-12 front and 25x10-12 rear tires on, lightweight aluminum wheels further boost ground clearance while reducing unsprung weight for lighter, more responsive steering.
  • Heavy-duty front carry bar and CV joint guards protect against rock and debris damage.

Additional Features:

  • Rugged steel cargo racks with special, extra-durable wrinkle paint finish can pack a total of 286 pounds combined (99 front, 187 rear).
  • Center-mounted, heavy-duty trailer hitch comes standard and can tow over 1200 pounds.
  • Handy, 12-liter underseat storage box.
  • Large, 5.3-gallon fuel tank features an electronic, bar-type gauge and easy-access petcock.
  • Wide, fully integrated floorboards feature serrated footpegs for extra grip in wet conditions.
  • Large, specially designed seat is extra plush and widely contoured for all-day rider comfort.
  • Dual 30-watt multi-reflector Krypton bulb headlights with high/low beams feature stylishly sleek cat-eye design; 5-watt/21-watt tail/brake light.
  • Convenient, water-resistant 12-volt DC power outlet handles a wide range of accessories.
  • Maintenance-free 18-amp-hour battery provides extra starting power, even in cold weather.
  • Underseat marine-spec electrical components ensure maximum protection from the elements.



  • Type 660cc, 4-stroke, liquid-cooled single; SOHC, 5 valves
  • Bore x Stroke 100.0mm x 84.0mm
  • Compression Ratio 9.1:1
  • Carburetion Mikuni 42mm BSR
  • Ignition DC – CDI
  • Starting System Electric w/auxiliary pull
  • Transmission Yamaha Ultramatic® V-belt with all-wheel engine braking/H, L, N, R, P
  • Engine Braking All 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, 7.1-in travel
  • Suspension/Rear Independent double wishbone; 5-way preload adjustment, 9.5-in travel
  • Brakes/Front Dual hydraulic discs
  • Brakes/Rear Hydraulic disc, 4-piston caliper; shaft-mounted
  • Tires/Front AT25 x 8-12 w/aluminum wheels
  • Tires/Rear AT25 x 10-12 w/aluminum wheels


  • L x W x H 82.1 x 45.3 x 47.6 in
  • Seat Height 34.6 in
  • Wheelbase 50.2 in
  • Turning Radius 126 in
  • Ground Clearance 11.8 in
  • Fuel Capacity 5.3 gal
  • Dry Weight 600 lb
  • Rack Capacity 99 lb Fr./187 lb Rr.
  • Towing Capacity 1,212 Lb.


  • Instrumentation Digital LCD multifunction display: speedometer, odometer, dual tripmeter, hourmeter, clock, fuel gauge, gear position
  • Lighting Dual 30W Krypton multi-reflector headlights & 21W/5W brakelight
  • Warranty 6 Month (Limited Factory Warranty)

MSRP* $7,199 (Steel Blue) Available from June 2007
$7,199 (Hunter Green) Available from June 2007
$7,199 (Red) Available from June 2007
$7,549 (Realtree® AP HD™ Camouflage) Available from July 2007

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