Grizzly 450 Auto 4×4 IRS12
2012 Grizzly 450 Auto. 4×4 IRS
There’s a lot of Grizzly in this mid-size package.
Key Features:
- Grizzly 450 Automatic 4×4 has the same great features as big brothers Grizzly 700 and 550, 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 in 4WD mode.
- 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.
- Ground clearance of 10.8 inches and high-impact plastic skidplate improve maneuverability and undercarriage protection.
- Trick digital instrument panel boasts a multifunction LCD display with speedometer, odometer, dual tripmeter, hour meter, 4WD status, transmission position and clock.
- Using a multi-disc system running in hydraulic fluid, the sealed rear wet brake combines strong, consistent stopping power and greatly reduced maintenance requirements.
Engine:
- 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 is backed up by auxiliary recoil starter.
- Stainless steel muffler and header design provides superior power characteristics, exhaust sound and durability.
- Left-side–mounted (H, L, N, R, P) shift lever is easily accessible.
- 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.
- Specially designed drive system air intake vent helps prevent overheating and keep water and mud from entering drive case.
- Tool-free air filter box for easy access and quick maintenance.
Chassis/Suspension:
- 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.
- Class-exclusive, 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.
- Using a multi-disc system running in hydraulic fluid, the sealed rear wet brake combines strong, consistent stopping power and greatly reduced maintenance requirements.
- 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.
- Seat is extra plush, more than 3/4-inch thicker with softer foam than the previous design, results in more rider comfort at the same seat height with rider aboard as before.
Additional Features:
- Grizzly 700-inspired front-end styling boasts convenient waterproof storage compartment on the front fender.
- The water-resistant DC outlet is located to the side of the multifunction instrument panel for convenient access; automotivestyle receptacle handles a wide range of accessories.
- 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 Camouflage for true hunting performance.
- 2-inch receiver hitch for outstanding towing capability.
- Large-capacity, 4-gallon fuel tank has a built-in gauge and easy-to-reach petcock valve.
- Water-resistant, large-capacity underseat storage box provides added convenience.
- 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 multireflector 30-watt Krypton bulb headlights with high and low beams; rear brake light.
- Built in Newnan, GA, USA.
| MSRP* | $7,149 (Realtree AP Camo) Available from September 2009
$6,799 (Hunter Green) Available from November 2009 $6,799 (Steel Blue) Available from November 2009 |
| Engine | |
| Type | 421cc, 4-stroke, liquid-cooled single; SOHC |
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| Bore x Stroke | 84.5mm x 75.0mm |
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| Compression Ratio | 10.0:1 |
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| Fuel Delivery | Mikuni® 33mm BSR |
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| Ignition | DC-CDI |
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| Starting System | Electric w/auxiliary pull |
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| Transmission | Yamaha Ultramatic® V-belt with all-wheel engine braking/H, L, N, R, P |
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| Drive Train | Yamaha On-Command® pushbutton; 3-way locking differential; 2WD, 4WD, locked 4WD; shaft drive |
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| Chassis | |
| Suspension/Front | Independent double wishbone; 5-way preload adjustment, 6.3-in travel |
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| Suspension/Rear | Independent double wishbone; 5-way preload adjustment, 7.1-in travel |
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| Brakes/Front | Dual hydraulic discs |
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| Brakes/Rear | Sealed oil bathed, multi disc |
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| Tires/Front | AT25×8-12 |
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| Tires/Rear | AT25×10-12 |
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| Dimensions | |
| Length | 78.5 x 43.0 x 44.1 in |
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| Seat Height | 33.5 in |
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| Wheelbase | 48.5 in |
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| Turning Radius | 118 in |
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| Ground Clearance | 10.8 in |
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| Fuel Capacity | 4.0 gal |
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| Wet Weight | 628 lb |
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| Rack Capacity | 88 lb Fr./176 lb Rr. |
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| Towing Capacity | 1322 lb w/2-in receiver hitch |
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| Other | |
| Instrumentation | Digital LCD multifunction display: speedometer, odometer, dual tripmeter, hour meter, clock, gear position |
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| Lighting | Dual 30W Krypton multireflector headlights & 21W/5W brakelight |
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| Warranty | 6 Month (Limited Factory Warranty) |
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Outdoors
- Utility ATV
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- Grizzly 700 FI Auto 4×4 EPS Special Edition
- Grizzly 700 FI Auto 4×4 EPS
- Grizzly 700 FI Auto 4×4
- Grizzly 550 FI Auto 4×4 EPS Special Edition
- Grizzly 550 FI Auto 4×4 EPS
- Grizzly 550 FI Auto 4×4
- Grizzly 450 Auto 4×4 IRS12
- Big Bear 400 4×4 IRS
- Grizzly 350 Auto 4×4 IRS
- Grizzly 350 Auto 4×4
- Grizzly 350 Automatic
- Grizzly 125 Automatic
- Side x Side
- Generator


