LOT 527

1928 BSA 500cc S28 'Sloper' Registration no. BF 8990 Frame no. P6632-S Engine no. P4074-28

Sold for £9,775 inc. premium

Lot 527

1928 BSA 500cc S28 'Sloper'
Registration no. BF 8990 Frame no. P6632-S Engine no. P4074-28

The Spring Sale - The International Classic MotorCycle Show|23 April 2022, 10:00 BST|Stafford, Staffordshire County Showground

1928 BSA 500cc S28 'Sloper'
Registration no. BF 8990
Frame no. P6632-S
Engine no. P4074-28

Introduced in 1910, the first series-production BSA to feature the marque's distinctive green and cream tank colours was a 499cc (3½hp) sidevalve single. Well engineered and equally well made, this first BSA proved an enormous success and effectively established the company's reputation as a maker of high quality motorcycles. Introduced for the 1927 season, the influential 'Sloper' started a trend which saw many of BSA's competitors adopt inclined motors. The Sloper featured a trend-setting saddle tank that afforded a low seating position, and for 1930 gained chromium-plated brightwork and a new frame with forged steel spine. Models with the 493cc overhead-valve engine came with twin-port cylinder heads. For 1930 the Birmingham firm offered no fewer than 18 models, six of which had inclined engines. The Sloper range remained essentially vintage in character until its demise in 1935, by which time the line-up had shrunk to just two models: one overhead-valve, the other sidevalve, both of 595cc.

This splendid overhead-valve Sloper benefits from a full restoration which the owner only completed in 2021. The BSA was run last year but will require further re-commissioning before serious use. Described by the private vendor as in good condition throughout, the machine comes with a V5C registration document; a VMCC dating letter; and a ring binder of photocopied technical literature.
Offered without key

Footnotes

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