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MotoLibrary Score
46/100Balanced
Power/Weight
0.26 hp/kg
Top Speed
145 km/h
Engine
447 ccm
Technical Overview
1982 Honda CM 450 Custom Technical Analysis & Specification Breakdown
Engineered by Honda for the naked motorcycle segment, the 1982 Honda CM 450 Custom relies on a 447 cc (27.3 cu in) air-cooled twin, four-stroke powerplant. In factory specification, peak output is rated at 46 HP (33.6 kW) at 9,000 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 102.9 HP per liter, 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 CM 450 Custom measures 174 kg (384 lbs) dry, translating to a power-to-weight ratio of 0.26 HP/kg (3.78 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,450 mm (57.1 in) wheelbase engineered for balanced agility and highway composure. The 13-liter (3.4 US gal) fuel tank paired with a rated consumption of 3.92 L/100 km provides an estimated theoretical range of roughly 332 km (206 miles) between fill-ups, while factory top speed is listed at 145 km/h (90 mph).
Specific Output
102.9 HP/L
Power-to-Weight
0.26 HP/kg (3.78 kg/HP)
Theoretical Range
~332 km (206 mi)
Engine
Displacement447.0 ccm (27.28 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power46.0 HP (33.6 kW)) @ 9000 RPM
Compression9.1:1
Bore x Stroke75.0 x 50.6 mm (3.0 x 2.0 inches)
Valves/Cylinder3
Fuel SystemCarburettor
Fuel ControlOverhead Cams (OHC)
IgnitionCDI
CoolingAir
Transmission
Final DriveChain (final drive)
Performance
Top Speed144.8 km/h (90.0 mph)
0-400m13.70 seconds
Fuel Consumption3.92 litres/100 km (25.5 km/l or 60.01 mpg)
Greenhouse Gases90.9 CO2 g/km. (CO2 - Carbon dioxide emission)
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Power
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Weight
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Fuel Capacity
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Brakes
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Suspension
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