The Big Dog K9 is a popular model from Big Dog Motorcycles, a manufacturer of semi-custom, chopper-style bikes. Here are some key facts about the Big Dog K9:

General Facts and History

• Manufacturer: Big Dog Motorcycles, based in Wichita, Kansas. The company was founded in 1994, shut down in 2011, and has since reopened under new ownership.
• Design: The K9 is a classic chopper, known for its long, raked-out front end, low-slung single seat, and wide rear tire. It is a signature model for the brand.
• Production: The K9 model was produced for several years, with a major redesign and re-introduction in 2016 when the company re-launched.
• Customization: Big Dog Motorcycles’ business model is based on offering “production custom” bikes, providing a custom-styled motorcycle with production-grade reliability and support.

Key Features and Specifications

• Engine: The K9 is powered by a large-displacement, air-cooled, 45-degree V-twin engine, typically an S&S SuperSidewinder motor. Displacement can vary by model year, but is often around 117 cubic inches ($1,916\text{cc}$) or 124 cubic inches ($2,032\text{cc}$).
• Transmission: It features a 6-speed transmission, often a Baker or a Jim’s Right-Side-Drive, which is part of the “Balance Drive System” designed to improve handling by placing the final drive on the right side of the bike.
• Tires: A defining feature of the K9 is its wide rear tire, which is often a 300mm. The front tire is typically much narrower.
• Frame: The frame has a distinct chopper geometry with significant stretch and rake. The frame rake is typically around 39 degrees.
• Brakes: Braking is handled by performance-oriented disc brakes with 4-piston calipers, often from Performance Machine.
• Weight and Dimensions:
  • Curb Weight: Varies by year, but is typically around 710-716 lbs (wet).
  • Overall Length: The K9 is a long motorcycle, with an overall length of around 108 inches (9 feet).
  • Seat Height: The seat is very low, around 24.25 inches.
  • Fuel Capacity: Typically holds around 4.4 gallons of fuel.