2008 Yamaha Grizzly 450 Auto 4x4


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Cycle Enterprises
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Grizzly 450 Auto 4x4



Four-Wheel independence. Now with a high-tech, sealed rear wet brake and a 2-inch receiver hitch, the Grizzly 450 Automatic 4x4 gives you more top-of-the-line features to offer up unlimited possibilities at work or play.

Key Features
  • Grizzly 450 Automatic 4x4 has the same great features as big brothers Grizzly 660/700, including four-wheel independent suspension, and it's powered by a fuel-efficient liquid-cooled engine.
  • 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 and class-exclusive all-wheel downhill engine braking.
  • Industry-exclusive three-position On-Command® In/Out 4WD feature lets you switch between 2WD, limited-slip 4WD and class-exclusive fully locked differential 4WD—all with the simple push of a button. Override button allows engine to make maximum rpm in full Diff Lock mode.
  • Class-exclusive 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.
  • 10.8 inches of ground clearance and high-impact plastic skid plate improve maneuverability and undercarriage protection.
  • Trick digital instrument panel boasts a multifunction LCD display with speedometer, odometer, dual tripmeters, hourmeter, 4WD status, transmission position and clock.
New for 2008
  • A multi-disc system running in hydraulic fluid, the sealed rear wet brake combines strong, consistent stopping power with greatly reduced maintenance requirements.
  • New, 2-inch receiver hitch for outstanding towing capability.
  • 421cc liquid-cooled, SOHC four-stroke single is rugged and powerful.
  • Semi-oval slide 33mm BSR Mikuni carburetor and high-output DC-CDI ignition deliver fantastic 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 (Hi/Lo/N/R/P) shift lever keeps throttle hand free while shifting.
  • 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.
  • Hand-operated side cover drain keeps belt dry and free from mud and debris.
  • 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 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.
  • 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.
  • Low seat height creates enhanced handling.
  • 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).
  • Available in four colors, including Realtree® AP High Definition™ Camouflage for true hunting performance.
  • Large-capacity, 4-gallon fuel tank has a built-in gauge and easy-to-reach petcock valve.
  • Recessed, water-resistant, automotive-type DC power outlet handles wide range of accessories.
  • Water-resistant, large-capacity underseat storage box provides added convenience.
  • Plush, specially designed seat is wide and 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.
  • Easy-access, underseat marine-spec electrical components ensure maximum protection from the elements.
  • Dual, bright multi-reflector 30-watt Krypton bulb headlights with high and low beams; rear brake light.
  • Built in Newnan, GA, USA.
  • Type: 421cc, 4-stroke, liquid-cooled single; SOHC
  • Bore x Stroke: 84.5mm x 75.0mm
  • Compression Ratio: 10.0:1
  • Carburetion: Mikuni 33mm 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, 6.3-in travel
  • Suspension/Rear: Independent double wishbone; 5-way preload adjustment, 7.1-in travel
  • Brakes/Front: Dual hydraulic discs
  • Brakes/Rear: Sealed wet brake
  • 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: 593 lb
  • Rack Capacity: 88 lb Fr./176 lb Rr.
  • Towing Capacity: 1,102 lb w/2 in reciever hitch
  • Instrumentation: Digital LCD multifunction display: speedometer, odometer, dual tripmeter, hourmeter, clock, gear position
  • Lighting: Dual 30W Krypton multi-reflector headlights & 21W/5W brakelight



Engine Type
421 cc, 4-stroke, liquid-cooled single; SOHC
421 cc
Bore x Stroke
84.5 x 75.0 mm
Engine Cooling
Liquid Cooled
Starting System
Ignition: DC-CDI; Starting System: Electric w/auxiliary pull


Front Suspension
Independent double wishbone; 5-way preload adjustment
Front Travel
6.3 in.
Front Brake Type
Dual hydraulic discs
Front Tires
Rear Travel
7.1 in.
Rear Suspension
Independent double wishbone; 5-way preload adjustment
Rear Brake Type
Sealed wet brake
Rear Tires


Dry Weight
593 lbs
Front Rack Capacity
88 lbs
Rear Rack Capacity
176 lbs
Towing Capacity
1,102 lb w/2 in reciever hitch
Fuel Capacity
4.0 gal.
Ground Clearance
10.8 in.
Machine Dimensions (LxWxH)
78.5" x 43.0" x 44.1"
48.5 in

Drive Train

Drive Train
Yamaha On-Command® pushbutton; 3-way locking differential; 2WD, 4WD, locked 4WD; shaft drive
Yamaha Ultramatic® V-belt with all-wheel engine braking/H, L, N, R, P


Digital LCD
Digital LCD
Dual 30W Krypton multi-reflector headlights & 21W/5W brakelight
Blue Steel, Hunter Green, Red, Realtree® AP HD™ Camouflage