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2010 Yamaha Grizzly 450 4x4 IRS
2010 Yamaha Grizzly 450 4×4 IRS

2010 Yamaha Grizzly 450 4x4 IRS
2010 Yamaha Grizzly 450 4×4 IRS

2010 Yamaha Grizzly 450 4x4 IRS
2010 Yamaha Grizzly 450 4×4 IRS

2010 Yamaha Grizzly 450 4x4 IRS
2010 Yamaha Grizzly 450 4×4 IRS

– 2010 Yamaha Grizzly 450 4×4 IRS

2010 Yamaha Grizzly 450 4×4 IRS

A perfect blend of comfort, capability, ruggedness, now with rear sealed wet brake and 2 inch receiver hitch.

There’s a lot of Grizzly in this mid-sized package.

A mid-size ATV with our exclusive fully automatic Ultramatic transmission, On-command 2WD/4WD with Diff Lock, independent rear suspension (IRS), digital meter, rear sealed wet disc brake, 2″ receiver hitch and more.




Features and Specifications:

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.


” 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.


” 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.



2010 Yamaha Grizzly 450 4×4 IRS – USA Specifications
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

Type 421cc, 4-stroke, liquid-cooled single; SOHC

Bore x Stroke 84.5mm x 75.0mm

Compression Ratio 10.0:1

Fuel Delivery 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

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 oil bathed, multi disc

Tires/Front AT25x8-12

Tires/Rear AT25x10-12

Length 78.5 x 43.0 x 44.1 in

Seat Height 33.5 in

Wheelbase 48.5 in

Turning Radius 118 in

Ground Clearance 10.8 in

Fuel Capacity 4.0 gal

Wet Weight 628 lb

Rack Capacity 88 lb Fr./176 lb Rr.

Towing Capacity 1322 lb w/2-in receiver hitch

Instrumentation Digital LCD multifunction display: speedometer, odometer, dual tripmeter, hour meter, clock, gear position

Lighting Dual 30W Krypton multireflector headlights & 21W/5W brakelight

Warranty 6 Month (Limited Factory Warranty)


2010 Yamaha Grizzly 450 4×4 IRS – Canada Specifications
Canadian MSRP* $NA

Model not available in Canada




ATV Safety Notes

– ATVs with engines 70 to 90cc are recommended for use only by riders 12 years and older and always with adult super vision. ATVs with engines 90cc or greater are recommended for use only by riders ages 16 years and older.

– Yamaha recommends that all ATV riders take an approved training course. For safety and training information, see your dealer or call the ATV Safety Institute at 1-800-887-2887.

– ATVs can be hazardous to operate. For your safety, always avoid paved surfaces. Never ride on public roads. Always wear a helmet, eye protection and protective clothing.

Never carry passengers. Never engage in stunt riding. Riding and alcohol/drugs don’t mix. Avoid excessive speed. And be particularly careful on difficult terrain. There are few joys in life equal to the free-spirited thrill and experience of ATV riding. And that’s why it’s important for all of us to do
our part as responsible riders. By following logical, common-sense rules, we can maintain season after season of unparalleled enjoyment of our sport.

– Please remember to “tread lightly.” Always ride in a responsible manner, respecting the environment as well as all state and local laws. The riders in this brochure are professionals; don’t attempt to emulate them. Prices and specifications subject to change without notice. Please read your Owner’s Manual and all labels before operation. All ATVs come with a six-month Limited Factory Warranty. See your dealer for details.