YFZ450R / SE

Yamaha - ATV - YFZ450R / SE

YFZ450R / SE

2018 ATV

Taking ATV racing to the next level.

Serious racers will tell you that the Yamaha YFZ450R is the clear favourite with winning riders. Its sharp-handling chassis and ultra-responsive 450cc engine have made it today’s number one racing ATV. Nothing else comes close.

A race-bred assist and slipper clutch gives more precise control over corner entry speed for quicker lap times – while the race-bred engine delivers superfast throttle response and hard-hitting high rpm power for holeshot-winning performance.

Sharp-designed bodywork gives the rider space to shift the bodyweight during cornering or hard accleration. And the lightweight piggyback shocks make for razor-sharp handling!


•  Light action throttle lever
•  First ATV in its class with a slipper clutch
•  Lightweight piggyback shocks for precise handling
•  High compression engine for explosive performance
•  Shock calibration matches tyre character perfectly
•  Cam design for strong high rpm power feeling
•  32-bit fuel injection for instant response
•  Lightweight weldless hybrid aluminium frame
•  Cast aluminium swingarm with piggyback rear shock
•  Dual front discs with wave-type rear
•  Quick-release fasteners for easy bodywork removal
•  Roomy bodywork and padded seat shape for comfort


Yamaha - ATV - YFZ450R / SE

Race-bred high-performance engine

The YFZ450R's race-bred 5-valve 4-stroke 450cc engine features a compression ratio of 11.8:1 and high performance camshafts for instant throttle response and race winning high rpm power. The Air Induction System gives high fuel efficiency, reduced exhaust emissions and increased durability.

Yamaha - ATV - YFZ450R / SE

Electronic Fuel Injection

For sharp throttle response the YFZ450R is equipped with a 42mm Mikuni throttle body which includes an ISC (Idle Speed Control) system for easy and reliable starting and warming up. This advanced system delivers instantaneous pick up and contributes towards reduced emissions.

Yamaha - ATV - YFZ450R / SE

Hybrid chassis engineering

The YFZ450R uses a special combination of aluminium and steel in its frame and swingarm construction, and this innovative 'hybrid chassis' design offers a winning combination of low weight together with outstanding strength and an excellent rigidity balance.

Yamaha - ATV - YFZ450R / SE

Assist and slipper clutch

The YFZ450R is the first ATV in its class to feature an assist and slipper clutch that's designed to partially disengage when you're downshifting quickly for a turn. By virtually eliminating the effects of engine braking, the slipper clutch allows the rider to control corner entry speeds using the brakes for enhanced control and reduced lap times.

Yamaha - ATV - YFZ450R / SE

Slick-shifting transmisison

The YFZ450R's 5-speed transmission is one of the slickest shifting systems in its class, and is fitted with an assist and slipper clutch - the first time this race-developed technology has been used in this category. The system makes shifting between gears even easier for quicker lap times and reduced fatigue.

Yamaha - ATV - YFZ450R / SE

Long-travel adjustable suspension

For reduced unsprung weight this model is fitted with Kayaba piggyback front shock absorbers and a calibrated rear shock. These adjustable units give refined handling performance to give you the edge over other competitors.

Yamaha - ATV - YFZ450R / SE

Ergonomic design

The YFZ450R is designed to work in perfect harmony with the rider for improved performance on the track and added comfort on the trail. The front and rear fenders are designed to give more space around the rider for easy weight shifting when cornering or accelerating - and the heel guards are also relocated further back.

Yamaha - ATV - YFZ450R / SE

Special Edition

There's only one ATV that's more exclusive than the YFZ450R - and that's the YFZ450R SE! This top of the range Special Edition comes with an aggressive white colour scheme that gives an even more distinctive look on the track or trail. And with its bright 'red' coloured body and wheel graphics, the YFZ450R SE demands attention.

Technical specifications


Engine type
Single cylinder, liquid-cooled, 4-stroke, DOHC, 5-valves
Bore x stroke
95.0 mm x 63.4 mm
Compression ratio
11.8 : 1
Lubrication system
Dry sump
Fuel system
Fuel Injection 42 mm EHS with ISC
Ignition system
Starter system
Transmission system
5-speed, manual slipper clutch
Drive system
Final transmission
Sealed O-ring chain, eccentric adjustment


Front suspension system
Independent double wishbone, threaded preload adjustable dual-rate coil-over springs, 3-way adjustable damper, 250 mm wheel travel
Rear suspension system
Cast aluminium swingarm, threaded preload adjustable coil-over springs, 3-way adjustable damper, 280 mm wheel travel
Front brake
Dual ventilated disc with hydraulic twin piston callipers
Rear brake
Wave-type ventilated disc with twin piston callipers
Front tyres
Rear tyres


Overall length
1,795 mm
Overall width
1,240 mm
Overall height
1,065 mm
Seat height
810 mm
Wheel base
1,270 mm
Minimum ground clearance
115 mm
Wet weight (including full oil and fuel tank)
184 kg
Fuel tank capacity
10.0 litres