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Lot 359: 1934 Sunbeam 348cc Model 8

Collectors' Motorcycles, Bonhams (16 October 2005)

Sunbeam introduced overhead-valve engines in the mid-1920s having established its sporting credentials with sidevalve machines. Subsequent changes to the overhead-valve engine were confined mainly to its top-end. The early flat-tankers featured a straight-ahead exhaust port, a peculiarity which necessitated the adoption of a bifurcated down-tube, then later on in the 1920s Sunbeam followed the then-fashionable trend to twin-port ’heads before reverting to a single-port design in 1934. Push-rod enclosure had arrived by 1930 to be followed a couple of years later by partial enclosure of the rocker gear. Offered for restoration, this twin-port Model 8 is offered with old-style continuation logbook and Department of Transport letter linking the registration mark ‘JY 4209’ to the machine.

Lot Details
Auction Collectors' Motorcycles
Bonhams, Classic & Motorcycle Mechanics Show, Stafford
TypeMotorcycle
Lot Number359
Estimate£1200-£1800
Outcome SOLD
Hammer Price£2400
Hammer Price (inc premium)£2760
Year1934
Condition rating
Registration number
Mileage-
Chassis number
Engine number8.503.1.588
Engine capacity (cc)
Engine - cylinders
Number of doors