Naked Motorcycles
2023Janus Halcyon 450
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The 2023 Janus Halcyon 450 is an all-around middleweight single-cylinder motorcycle powered by a 445cc SWM engine delivering 30 horsepower. Ideal for versatile riders seeking a reliable, efficient platform, it excels as a commuter and light adventure bike with accessible handling and fuel efficiency. Its oil-air cooling system and robust construction make it dependable for varied riding conditions.
- Capacity
- 445.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 156.5 kg
- Seat height
- 762 mm
- Power
- 30.0 HP (21.9 kW) @ 7500 RPM
What’s new for the 2023 Janus Halcyon 450
vs the 2022| Spec | 2022 | 2023 |
|---|---|---|
| Dry weight | 160.6 kg (354.1 pounds) | 156.5 kg (345.0 pounds) |
How it rides
Editorial estimate from the spec sheet - not lab tested- 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?
Worked out in your browser - nothing is sent to usRange and running costs
Worked out in your browser - nothing is sent to usBased 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.
Engine
- Capacity
- 445.0 ccm
- Power
- 30.0 HP (21.9 kW) @ 7500 RPM
- 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
- 0.1917 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
- 156.5 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
- Front brakes
- Double disc. Two-piston caliper Brembo
- Front brakes diameter
- 280 mm
- Rear brakes
- Single disc. Single Piston caliper brembo
- Front tyre
- 4.00-18
- Rear tyre
- 4.50-18
Other
- Color options
- British Racing Green, Vintage Red, Aga Cream, Black, American Blue, Charcoal, Olive, Cardinal Red
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|
| Capacity | 445 cc | 445 cc | 445 cc | 445 cc |
| Dry weight | 161 kg | 161 kg | 157 kg | 165 kg |
| Seat height | 762 mm | 762 mm | 762 mm | 762 mm |
| Fuel capacity | 7.6 L | 7.6 L | 7.6 L | 7.6 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Janus Halcyon 450?
The 2023 Janus Halcyon 450 has a Capacity of 445.0 ccm (27.16 cubic inches).
What engine power does the Janus Halcyon 450 have?
The 2023 Janus Halcyon 450 has a Power of 30.0 HP (21.9 kW) @ 7500 RPM.
How many gears does the Janus Halcyon 450 have?
The 2023 Janus Halcyon 450 has a Gearbox of 5-speed.
How much does the Janus Halcyon 450 weigh?
The 2023 Janus Halcyon 450 has a Dry weight of 156.5 kg (345.0 pounds).
Shop this bike
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The 2023 Janus Halcyon 450 is a sleek and stylish option for those in the market for a high-performance escape. With its powerful engine and advanced technology features, this vehicle is designed to provide an exhilarating driving experience. The interior is also top-notch, with luxurious materials and comfortable seating for long journeys. Overall, the Janus Halcyon 450 is a fantastic choice for anyone looking for a reliable and stylish escape vehicle.
In conclusion, the 2023 Janus Halcyon 450 is a top-of-the-line escape vehicle that offers a perfect combination of performance, style, and comfort. With its powerful engine and advanced technology features, this vehicle is sure to provide an enjoyable driving experience. Whether you're planning a weekend getaway or a longer road trip, the Janus Halcyon 450 has everything you need for a memorable escape.
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