Triumph Bonneville Black Engine 2004 Owner's Handbook

The 2004 Triumph Bonneville Black features a robust and reliable engine that exemplifies classic British engineering. This motorcycle is powered by a 790cc air-cooled, DOHC, parallel-twin engine designed to deliver a smooth yet powerful ride experience. The engine's bore and stroke measure 86mm x 68mm, and it has a compression ratio of 9.2:1, which enables effective power delivery and efficiency. Fueling this engine is a pair of carburetors with a manual choke, ensuring precise control over the mixture for optimized performance. The engine is paired with a five-speed manual transmission that offers seamless gear shifts, providing both flexibility and control for the rider.

The Bonneville Black’s engine is encased in a classic tubular steel cradle frame that contributes to its vintage aesthetic while ensuring structural integrity and durability. The exhaust system is a 2-into-2 configuration, delivering a distinctive exhaust note that complements the motorcycle's heritage. This model features a wet, multi-plate clutch system that facilitates smooth engagement and disengagement, enhancing the overall riding experience. The ignition system is a digital electronic setup, providing reliable starting and consistent performance across various conditions. With its combination of traditional design and modern engineering, the 2004 Triumph Bonneville Black engine stands as a testament to the enduring appeal of the Bonneville line.