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This dirt bike has been taken well care of. Runs great and low miles. Starts cold no problem. Hurry before it's gone!!

The2001 Yamaha YZ426Fis a high-performance 426cc single-cylinder dirt bike designed for AMA racing, featuring several performance upgrades over its predecessor.

Engine

• Displacement: 426 cc

• Configuration: DOHC, 5-valve, liquid-cooled, four-stroke

• Bore x Stroke: 95 × 60.1 mm

• Compression ratio: 12.5:1

• Carburetion: 39 mm Keihin FCR flat side with throttle position sensor

• New for 2001:Titanium valvesfor lighter reciprocating mass, improved throttle response, and higher rev ceilingsMotorcycle.com

Drivetrain

• Transmission: 5-speed, multi-plate wet clutch

• Final drive: Chain

Brakes & Wheels

• Front: 250 mm disc

• Rear: 240 mm disc

• Tires:

• Front: 80/100-21 Dunlop K739FA

• Rear: 110/90-19 Dunlop K739

Suspension

• Front: 46 mm Kayaba inverted telescopic fork, 11.8 in travel, adjustable rebound/compression damping

• Rear: Single shock, 12.4 in travel

Key 2001 Upgrades

• Titanium valves replacing steel for reduced weight and improved power delivery

• Reshaped crankshaft for quicker throttle response and less high-end horsepower loss

• Improved carburetor settings for smoother, more linear throttle response

• Transmission tweaks for better power containment and longevity

• Suspension overhaul for reduced weight and smoother action

This model was aimed at competitive riders seeking a lighter, more responsive, and higher-revving single-cylinder option, with Yamaha’s titanium valve technology marking a significant step in performance tuning for the class.