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YFZ450R

Key Features

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    Race-bred high-performance engine

    The YFZ450R's race-bred 5-valve 4-stroke 450cc engine features a high 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.

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    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 pickup and contributes towards reduced emissions.

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    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.

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    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.

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    Slick-shifting transmission

    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.

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    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.

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    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.

Technical Specifications

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  • Engine
    Engine type
    Single cylinder, Liquid-cooled, 4-stroke, DOHC, 5-valves
    Displacement
    449cc
    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
    TCI
    Starter system
    Electric
    Transmission system
    5-speed, manual slipper clutch
    Drive system
    2WD
    Final transmission
    Sealed O-ring chain, eccentric adjustment
  • Chassis
    Front suspension system
    Independent double wishbone, Piggy Back 3-way adjustable damper, 250 mm wheel travel, threaded preload adjustable dual-rate coil-over springs
    Rear suspension system
    Cast aluminium swingarm, Piggy Back 3-way adjustable damper, threaded preload adjustable coil-over springs, 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
    AT21x7R10
    Rear tyres
    AT20x10R9
  • Dimensions
    Overall length
    1,795 mm
    Overall width
    1,240 mm
    Overall height
    1,065 mm
    Seat height
    810 mm
    Wheelbase
    1,270 mm
    Minimum ground clearance
    115 mm
    Wet weight (including full oil and fuel tank)
    184 kg
    Fuel tank capacity
    10.0 litres
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