Naked Motorcycles

2024Janus Halcyon 450

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The 2024 Janus Halcyon 450 is a versatile all-rounder powered by a 445cc single-cylinder four-stroke engine producing 30 horsepower, making it ideal for novice and intermediate riders seeking an accessible middleweight. Its air-cooled design and straightforward mechanicals prioritize reliability and ease of maintenance, while the modest 144.8 km/h top speed ensures manageable performance for everyday riding and light touring.

Capacity: 445.0 ccm
Engine: Single, four-stroke
Gearbox: 5-speed
Dry weight: 165.0 kg
Seat height: 762 mm
Power: 30.0 HP (22.4 kW)

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What’s new for the 2024 Janus Halcyon 450

vs the 2023

Spec	2023	2024
Power	30.0 HP (21.9 kW) @ 7500 RPM	30.0 HP (22.4 kW)
Dry weight	156.5 kg (345.0 pounds)	165.0 kg (363.8 pounds)

Other years 2021 2022 2023 2024

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail20%

Cornering45%

City riding70%

Daily riding65%

Touring40%

Two-up40%

Track15%

Best for: It's built for relaxed cruising and everyday commuting rather than outright speed or long-distance touring.
Built for: It has a classic, unhurried cruiser personality with simple mechanicals and a laid-back retro feel.
Not ideal for: It's not for riders seeking highway-speed touring performance or any serious off-road capability.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 762mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2024 Janus Halcyon 450, with a moderate knee angle of around 115 degrees and a forward-leaning riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 751-820 mm — Middle Ground →

Find bikes that fit your height →

Range and running costs

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Units

Currency

Fuel per litre

Riding a year

Based on the published US (EPA-style) fuel economy estimate and tank size. Real-world figures depend on how and where you ride, and the last litres of a tank are reserve. Prices shown greyed are examples - type your own.

Full specifications

Engine

Capacity: 445.0 ccm
Power: 30.0 HP (22.4 kW)
CO2 Emissions: 81 CO2 g/km
EPA Est. Fuel Consumption: 3.45 L/100km (68.2 US mpg)
EPA CO Emissions: 5.9 CO g/km
Engine type: Single, four-stroke
Power/weight ratio: 0.1818 HP/kg (dry)
Compression: 10.1:1
Cooling system: Air
Fuel system: Injection
Starting: Electric
Ignition: CDI
Aspiration: Naturally aspirated
Valves per cylinder: 4
Lubrication system: Dry sump with gerotor pump, cartridge filter, and oil cooler
Torque: Not on record - add it

Transmission

Gearbox: 5-speed
Transmission type: Manual
Clutch: Wet multiplate

Performance

Top speed: 144.8 km/h (90.0 mph)

Dimensions & weight

Wheelbase: 1422 mm
Overall length: 2184 mm
Overall width: 787 mm
Overall height: 1041 mm
Seat height: 762 mm
Dry weight: 165.0 kg
Fuel capacity: 7.60 litres

Chassis & suspension

Frame: DOM tubular steel cradle
Front suspension: Proprietary dual progressive shock leading-link
Rear suspension: Proprietary cantilever transom with dual progressive coil-over Ikon shocks

Brakes & wheels