Allround · 1957
Colonel
Technical Overview
1957 James Colonel Technical Analysis & Specification Breakdown
At the heart of the 1957 James Colonel allround motorcycle, James relies on a 225 cc (13.7 cu in) air-cooled single cylinder, two-stroke powerplant. Internal engine geometry specifies a bore and stroke of 63.0 x 72.0 mm (2.5 x 2.8 inches) with a 7.0:1 compression ratio.
Within MotoLibrary's James archive, this model family spans 5 indexed model years from 1955 to 1959, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Engine
Displacement 225.0 ccm (13.73 cubic inches)
Engine Type Single cylinder, two-stroke
Engine Details In-line four, two-stroke
Compression 7.0:1
Bore x Stroke 63.0 x 72.0 mm (2.5 x 2.8 inches)
Fuel System Carburettor. Villers
Ignition Magneto
Lubrication Wet sump
Cooling Air
Transmission
Final Drive Chain (final drive)
Chassis
Frame Type Single downtube
Front Suspension Hydralic telescopic forks
Wheels & Brakes
Front Tyre 3-18
Rear Tyre 3-18
Front Brakes Expanding brake (drum brake)
Rear Brakes Expanding brake (drum brake)
Dimensions & Weight
Overall Length 2002 mm (78.8 inches)
Overall Width 860 mm (33.9 inches)
Other
Starter Kick
More from James
Rider Profile
Who Is This Bike For?
🌍
Best For
All-Round & Adventure
Estimate
Ownership Cost Calculator
⛽ Fuel
per year
🔧 Maintenance
per year
🛡️ Insurance
per year
TOTAL
* Estimates only. Actual costs vary by country, riding habits, insurance provider and maintenance schedule.