The 1984-2001 Honda CR500R is one of the most iconic and powerful motocross bikes ever made, famous for its monstrous two-stroke engine and legendary performance. Here's a comprehensive breakdown:

General Overview

• Production Years: 1984-2001
• Category: Motocross / Off-road
• Engine Type: 2-stroke single-cylinder
• Reputation: Known as a "beast" due to its immense power and challenging ride characteristics.

Engine and Performance

• Displacement: 491 cc
• Cooling System:
  • 1984: Air-cooled
  • 1985-2001: Liquid-cooled for improved reliability and consistent performance.
• Bore x Stroke: 89.0 mm x 79.0 mm
• Compression Ratio: Varied slightly over the years, typically around 5.4:1.
• Horsepower: Estimated between 55-60 HP, making it one of the most powerful motocross bikes ever produced.
• Torque: Famous for its incredible low-end grunt and explosive power delivery, producing around 50 lb-ft of torque.
• Fuel System: Keihin carburetor (e.g., PJ38 or PJ39, depending on year).
• Powerband: Brutally strong, requiring skilled riders to manage the throttle carefully.

Drivetrain

• Transmission: 5-speed manual, well-spaced for managing the immense power output.
• Clutch: Multi-plate wet clutch designed to handle the high torque loads.

Chassis and Suspension

• Frame:
  • 1984-1986: Steel frame.
  • 1987-2001: Updated aluminum perimeter frame for reduced weight and improved handling.
• Front Suspension: Showa telescopic forks with significant travel:
  • Early years: Non-cartridge forks.
  • Later years: Fully adjustable Showa forks for better damping and control.
• Rear Suspension: Honda’s Pro-Link rear suspension with a fully adjustable shock and over 12 inches of travel.

Brakes and Wheels

• Front Brakes:
  • Early years: Single drum brake.
  • 1985 onwards: Single hydraulic disc for improved stopping power.
• Rear Brakes:
  • 1984-1987: Drum brake.
  • 1988 onwards: Hydraulic disc brake.
• Tires: Aggressive knobby tires optimized for off-road and motocross use.

Dimensions and Weight

• Seat Height: Approximately 37.0 inches, suitable for taller and more experienced riders.
• Ground Clearance: 13.8 inches, ideal for off-road terrains.
• Weight: Ranged from 222 lbs (dry) to around 245 lbs (wet), relatively light for a bike with such power.

Key Updates and Evolution

1. 1984:
   • The debut model featured an air-cooled engine, known for its raw, untamed power.
2. 1985:
   • Introduction of liquid cooling for better thermal management and performance stability.
3. 1987:
   • Major redesign with an aluminum frame, reducing weight and improving handling.
4. 1990s Refinements:
   • Suspension upgrades, improved ergonomics, and minor engine tweaks to enhance reliability and rider control.

Pros

• Massive power and torque, ideal for open terrain and hill climbs.
• Rugged and durable design, built to handle extreme motocross conditions.
• Simple two-stroke mechanics make it easier to service and modify.
• Iconic and sought-after bike among collectors and enthusiasts.

Cons

• Intimidating power delivery, unsuitable for beginners.
• Requires frequent maintenance due to the high-stress engine.
• Vibrations can be intense, especially at high RPMs.
• Outdated suspension by modern standards, despite upgrades over the years.
• Discontinued after 2001, making parts harder to find.

Legacy

• The CR500R is remembered as one of the most powerful motocross bikes ever made. Its incredible torque and aggressive power delivery have earned it a cult following.
• Even after production ceased in 2001, the CR500R remains a favorite for hill climbers, desert racers, and vintage motocross enthusiasts.
• Custom "CR500AF" builds (CR500 engine in modern aluminum frames) have become popular, keeping the legacy alive.

Riding Experience

• The CR500R is a thrilling yet demanding bike to ride. It excels in open spaces, desert racing, and hill climbing but can be challenging on tight tracks or technical trails due to its raw power.
• Riders often describe the experience as "hanging on for dear life" due to the bike’s explosive acceleration and immense torque.

If you're considering restoring or maintaining a CR500R, the aftermarket community is robust, with plenty of options for parts and upgrades. Its legendary status ensures it remains a highly valued piece of motocross history.