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BSA B26

Make Model	BSA B26
Year	1937
Engine	Four stroke, single cylinder, Overhead valve
Capacity	348 cc / 21.2 cub in.
Bore x Stroke	71 x 88 mm
Cooling System	Air cooled
Lubrication	Dry sump
Oil Capacity	2.3 L / 4.8 US pints
Exhaust	Single, stainless steel and chrome
Carburetor	Amal
Ignition	6 V Magdyno
Starting	Kick start
Clutch	Multi-plate with integral cush drive
Transmission	4-Speed manual
Final Drive	Chain
Overall Gear Ratios	1st 16.2 / 2nd 11.4 / 3rd 7.3 / 4th 5.7:1
Frame	Triangulated frame, 531 tubing
Front Suspension	Shock absorber with finger adjustment steering damper
Rear Suspension	None, spring loaded saddle
Front Brakes	7 in. drum with finger adjustment
Rear Brakes	7 in. drum with finger adjustment
Wheels	Steel, spokes
Front Tyre	3.25 x 19 in., Dunlop Universal
Rear Tyre	3.25 x 19 in., Dunlop Universal
Wheelbase	1321 mm / 52 in.
Ground Clearance	152 mm / 6 in.
Seat Height	724 mm / 28.5 in.

When BSA's single-cylinder range was redesigned by Val Page for 1937, the engines took on many of the characteristics they would retain in the post-war era, most notably dry-sump lubrication, rear-mounted magneto and that distinctively shaped timing cover. There were four new offerings in the 350 class: the sidevalve B23 and a trio of overhead-valve models.

These comprised the B24 Empire Star, the B26 Star and the B25 Competition model, the latter equipped for trials use. The B-series quartet lasted until the wholesale revision of the range for 1940, which saw all four dropped.