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Honda TRX450R
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Home / Offroad Vehicles / Reviews / Yamaha YFZ450


Yamaha adapted the engine from the YZ450F motocrosser for use in one of the most serious ATVs yet, the YFZ450. The YFZ450 sports a hybrid 439cc DOHC titanium-valved five-speed engine and weighs 350 pounds, the highest power-to-weight ratio of any four-stroke ATV ever built.

Base MSRP: $6,899
Available: June 2003

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Engine Type439cc, 4-Stroke Single, Liquid Cooled w/ Fan, Titanium 5-Valve DOHC
Bore and Stroke95mm x 62mm
Compression Ratio11.9:1
Valve TrainUnicam; four-valve
CarburetionKeihin 39mm FCR w/ Throttle Position Sensor
IgnitionDC - CDI
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Transmission5-Speed Manual Clutch
Final Drive2WD; Sealed O-Ring Chain
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Front SuspensionIndependent Double Wishbone, 9.1 w/ Rebound, Compression and Threaded Preload Adjustment
Rear SuspensionAluminum Swing Arm, 10.1 w/ Rebound, Compression and Threaded Preload Adjustment
Front BrakesDual Hydraulic Disc, Twin Piston
Rear BrakeHydraulic Disc
Front TiresAT21 x 7-10 Radial
Rear TiresAT20 x 10-9 Radial
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Length72.4 inches
Width46.1 inches
Height42.9 inches
Wheelbase50.4 inches
Seat Height31.5 inches
Ground Clearance4.4 inches
Dry Weight350.0 pounds
Fuel Capacity2.6 gallons
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LightingDual 30W krypton multi-reflector headlights and 21/5W brake light
Age RecommendationFor highly experienced riders 16 years of age and older
Available ColorsTeam Yamaha blue/white; white/red
Model IDTRX450R
Warranty6 month (limited factory warranty)
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Keep checking back for all the latest news and photos on the Yamaha YFZ 450.


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