The 2004 Yamaha YZF-R1 is a legendary supersport motorcycle that marked a significant evolution in Yamaha’s R1 lineup. Known for its groundbreaking performance, sharp handling, and aggressive styling, the 2004 model year brought numerous advancements. Here’s a detailed overview:
Engine and Performance
- 998cc Inline-4 Engine: The liquid-cooled DOHC 20-valve engine delivers 172 horsepower at 12,500 rpm (measured at the crank) and 152 hp at the rear wheel, with a torque output of 78 lb-ft at 10,500 rpm.
- High Compression Ratio: With a 12.4:1 compression ratio, the engine offers excellent throttle response and high-revving performance.
- Ram-Air System: Yamaha introduced a new ram-air intake system for enhanced airflow at high speeds, increasing peak power.
- Fuel Injection: Features dual-injector fuel injection for precise fuel delivery and improved combustion efficiency.
Chassis and Handling
- Aluminum Deltabox Frame: A redesigned lightweight frame improves stiffness and contributes to excellent handling characteristics.
- Suspension:
- Front: Fully adjustable 43mm inverted forks.
- Rear: Fully adjustable rear shock with a new linkage system for improved rear-wheel grip.
- Radial-Mount Brakes: The 2004 R1 was one of the first production bikes to feature radial-mounted calipers for superior braking performance.
- Lightweight Design: Dry weight is only 172 kg (379 lbs), making it one of the lightest in its class at the time.
Styling and Aerodynamics
- Aggressive Look: Twin projector headlights and a sharp, aerodynamic fairing give the bike a modern and menacing appearance.
- Underseat Exhaust: A new underseat twin-pipe exhaust system not only looks sleek but also improves weight distribution.
- Digital Instrumentation: Features a modern dash with a digital speedometer, tachometer, trip meters, and fuel gauge.
Technological Features
- Slipper Clutch: Assists in smoother downshifts during aggressive riding.
- Adjustable Swingarm Pivot: Allows for fine-tuning of handling characteristics based on rider preference or track conditions.
Performance Specs
- Top Speed: Approximately 180 mph (290 km/h).
- 0-60 mph: Around 2.9 seconds, showcasing its blistering acceleration.
- Fuel Tank Capacity: 18 liters (4.8 gallons), providing a reasonable range for both street and track use.
Legacy
The 2004 Yamaha R1 is often regarded as one of the most iconic motorcycles in the supersport category. It raised the bar for liter-class bikes in terms of power, technology, and design, cementing its place as a favorite among enthusiasts and racers alike. Its combination of power, handling, and cutting-edge features set a benchmark that competitors sought to emulate.