The James Commodore J4 was a 98 cubic centimetre, two-stroke, motorcycle manufactured by the James Cycle Co and announced in November 1950. The Commodore was in production from 1951 to 1953.

  • Engine: Villiers Engineering 1F single-cylinder engine at 98cc 47 mm x 57 mm engine. Carburetor was a Villiers Type 6/0.
  • Transmission: Two speed with clutch. Handlebar gear lever.
  • Frame: Single downtube frame.
  • Suspension: Front was taper tube for girder type with single, central undampened spring. Rear: None
  • Brakes: 4" front and rear
  • Drive: Chain and sprocket
  • Wheels: 21 inches x 2.25 inches

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