T509 Speed Triple

1998 Triumph T509 Speed Triple Technical Analysis & Specification Breakdown

Built around Triumph's naked motorcycle platform, the 1998 Triumph T509 Speed Triple relies on a 885 cc (54 cu in) liquid-cooled in-line three, four-stroke powerplant. In factory specification, peak output is rated at 105 HP (76.6 kW) at 9,300 rpm while maximum torque reaches 84 Nm (62 lb-ft) at 7,600 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 118.6 HP per liter and a 1,700 rpm working window between peak torque (7,600 rpm) and peak power (9,300 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the T509 Speed Triple measures 196 kg (432 lbs) dry, translating to a power-to-weight ratio of 0.54 HP/kg (1.87 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance.