Halcyon 250

2023 Janus Halcyon 250 Technical Analysis & Specification Breakdown

Engineered by Janus for the classic motorcycle segment, the 2023 Janus Halcyon 250 utilizes a 229 cc (14 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 14 HP (10.2 kW) at 7,000 rpm while maximum torque reaches 15.8 Nm (11.7 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 61.1 HP per liter and a 1,500 rpm working window between peak torque (5,500 rpm) and peak power (7,000 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the Halcyon 250 measures 119.3 kg (263 lbs) dry, translating to a power-to-weight ratio of 0.12 HP/kg (8.52 kg per horsepower). Rider ergonomics and chassis geometry center around a 787 mm (31 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,346 mm (53 in) wheelbase engineered for quick, flickable steering geometry. The 7.34-liter (1.9 US gal) fuel tank paired with a rated consumption of 3.14 L/100 km provides an estimated theoretical range of roughly 234 km (145 miles) between fill-ups, while factory top speed is listed at 113 km/h (70 mph).

Within MotoLibrary's Janus archive, this model family spans 3 indexed model years from 2020 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.