Grizzly 450 IRS

2017 ATV

Grizzly 450 IRS

A dependable worker on any terrain.
If your job combines heavy haulage with unpredictable ground conditions, the Grizzly 450 IRS is an unstoppable and dependable work partner that’s ideal for busy days.
It’s packed with intelligent technology that makes every job easier – from comprehensive LCD instrumentation and a 3-mode On-Command® system for fast selection between drive settings, to superb traction on every kind of terrain. It’s also extremely fuel-efficient and has very low maintenance needs.
Taking on an extra-large job? A range of durable, practical accessories – from winches to ploughs to lighting kits – help you get the job done with minimum fuss.

•  Liquid-cooled 421cc SOHC 2 valve
•  Ultramatic® V-Belt Transmission L/H/N/R/P
•  On-Command® drive system 2WD/4WD/4WD Diff lock
•  The ultimate all-rounder
•  Independent Rear Suspension
•  Push button electric start
•  Sealed rear wet brake
•  Multifunctional LCD information panel
•  Integrated and sturdy cargo racks
•  Fuel-efficient & low-maintenance
•  Optimum ergonomics
•  Soft seat with durable cover for added comfort


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.

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.

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.

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.

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.

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.

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.

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.

Grizzly 450 IRS
Engine type
Single cylinder, liquid-cooled, 4-stroke, SOHC, 2-valves
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
Starter system
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
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
Rear tyres
Overall length
1,993 mm
Overall width
1,093 mm
Overall height
1,120 mm
Seat height
840 mm
1,233 mm
Minimum ground clearance
245 mm
Min. turning radius
3.0 m
Fuel tank capacity
15.0 litres
Oil tank capacity
2.6 litres
Loading limits
Front rack
40 kg
Rear rack
80 kg
Additional features
Steering System

Solid Green

Yamaha Blue

Red Spirit