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Key Features

Features Gallery
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    Multi-disc wet braking

    Yamaha's sealed oil-bathed multi-disc brake setup is ultra-durable, and protects the system from becoming clogged with the mud or stones that are thrown up during use. It also provides stronger, more consistent stopping power and is easier to adjust.

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    Digital LCD multifunction display

    The LCD data multifunction display has an engine hour meter that provides an accurate picture of usage. Other display readouts indicate time, overall mileage, trip meter, fuel status and transmission mode.

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    Comfort and practicality

    The lightweight seat designed for cold-weather riding comfort, plus a range of durable, practical accessories - such as winches, plough, lighting kits and battery chargers - help take the strain out of your busy working day.

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    Lightweight frame

    A one-piece frame reduces weight as well as being strong and rigid construction. It incorporates an extra-durable rear gear assembly, connected at three (rather than the normal two) separate points for best-ever protection against the strains of regular, heavy-duty use. A short, springy stabilizer bar offers increased support.

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    Powerful engine

    Big power lies at the heart of the Grizzly 450 IRS. The liquid-cooled 421cc engine offers the kind of low-rpm torque needed to get the heaviest loads moving. In addition, Ultramatic® transmission supplies engine braking to your ATV's driven wheels especially on steep, downhill working areas.

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    Independent Rear Suspension (IRS)

    Independently linking each individual rear wheel to the chassis means that the movement of one wheel is not affected by the movement of the other. This helps the ATV to soak up uneven terrain. It's a major contributor to rider comfort and peace of mind.

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    On-Command® drive system

    Yamaha's push-button On-Command 2WD/4WD system (with locked-differential 4WD) lets you switch between drive modes, giving near-instantaneous transition from cruising to climbing.

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    High cargo capacity

    Offering generous storage capacity, the Grizzly 450 IRS can carry a maximum payload of 120 kg - 40 kg at the front, and 80 kg at the rear. A lightweight hitch mount is capable of towing heavy loads up to 600kg.

Technical Specifications

Download Factsheet
  • Engine
    Engine type
    Single cylinder, liquid-cooled, 4-stroke, SOHC, 2-valves
    Displacement
    421cc
    Bore x stroke
    84.5 mm x 75.0 mm
    Compression ratio
    10.0 : 1
    Lubrication system
    Wet sump
    Fuel system
    Carburettor BSR33/1
    Ignition system
    DC-CDI
    Starter system
    Electric
    Transmission system
    Ultramatic® V-belt with all wheel engine braking, H/L/N/R/P
    Drive system
    On-Command® 2WD/4WD/diff-lock
    Final transmission
    Shaft
  • Chassis
    Front suspension system
    Independent double wishbone, 5 position preload adjustment, 160 mm wheel travel
    Rear suspension system
    Independent double wishbone, 5 position preload adjustment, 180 mm wheel travel
    Front brake
    Dual hydraulic disc
    Rear brake
    Sealed oil-bathed multi-disc
    Front tyres
    AT25x8-12
    Rear tyres
    AT25x10-12
  • Loading limits
    Front rack
    40kg
    Rear rack
    80kg
  • Dimensions
    Overall length
    1,993 mm
    Overall width
    1,093 mm
    Overall height
    1,120 mm
    Seat height
    840 mm
    Wheelbase
    1,233 mm
    Minimum ground clearance
    245 mm
    Min. turning radius
    3.0m
    Fuel tank capacity
    15.0litres
    Oil tank capacity
    2.6litres
  • Additional features
    Steering System
    Ackermann-type
ATVs with engines up to 70cc are recommended for use only by riders 6 years and older and always with adult supervision. ATVs with engines of 70 to 90cc are recommended only for use by riders 12 years and older, and always under adult supervision. ATVs with engines of 90cc or greater are recommended for use only by riders 16 years and older. ATVs are built to operate within their design limits. Safe towable weights, together with maximum carrying capacity are identified in the owner's manual if applicable. For durability, reliability, but most important of all, operator safety, under no circumstances should the recommended capacities be exceeded. Yamaha recommends that all ATV riders take an approved training course. For safety and training information, see your dealer or call your Yamaha Distributor in your country. ATVs can be hazardous to operate. For your safety: always avoid paved surfaces. ATVs are designed for unpaved surfaces only. Riding on paved surfaces may seriously affect handling and control and can cause loss of control. Always wear a helmet, eye protection and protective clothing. Never carry any passengers. Never engage in stunt riding. Riding and alcohol/drugs don't mix. Avoid excessive speed and be particularly careful on difficult terrain. Please 'tread lightly': always ride in a responsible manner, respecting the environment as well as country and local laws. The riders in this brochure are professionals: don't attempt to emulate them. The specification and appearance of Yamaha products will be varied from time to time without notice, and as shown here are illustrative only and are not a contractual description of products. Some models are shown with optional accessories. All ATVs come with a 12-month Limited Factory Warranty, except for Banshee, which carries a 90-day Limited Factory Warranty. See your dealer for details.