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.
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.
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.
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.
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.
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.
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 SpecificationsDownload Factsheet
- 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 stroke
- Rear suspension system
- Cast aluminium swingarm, threaded preload adjustable coil-over springs, 3-way adjustable damper, 280 mm stroke
- 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
- 1,270 mm
- Minimum ground clearance
- 115 mm
- Wet weight (including full oil and fuel tank)
- Fuel tank capacity
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 10 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.