BSA Models 1931 to 1940

 

1931

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
2.49 H.P. B31-1 Y1 101 Y1 101 250
2.49 H.P. B31-2 OHV Y2 101 Y1 101 250
2.49 H.P. B31-3 OHV DE LUXE Y3 101 Y3 101 250
2.49 H.P. L31-5 POST OFFICE YT 101 Y5 101 250
3.49 H.P. L31-4 Y4 101 Y1 101 350
3.49 H.P. L31-5 DE LUXE Y5 101 Y5 101 350
3.49 H.P. L31-6 OHV DE LUXE Y6 101 Y5 101 350
4.93 H.P. S31-10 OHV DE LUXE Y10 101 Y7 101 500
4.93 H.P. S31-7 Y7 101 Y7 101 500
4.93 H.P. S31-9 OHV Y9 101 Y7 101 500
5.57 H.P. H31-8 DE LUXE Y8 101 Y7 101 550
7.70 H.P. E31-11 TWIN 2 GALLON TANK Y11 101 Y11 101 750
7.70 H.P. E31-11 TWIN 3 GALLON TANK Y11 101 Y11A 101 770
9.86 H.P. G31-12 TWIN WORLD TOUR Y12 101 Y12 101 1000
         

1932

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
2.49 H.P. B32-1 OHV Z1 101 Z1 101 250
3.49 H.P. L32-2 Z2 101 Z1 101 350
3.49 H.P. L32-3 OHV Z3 101 Z3 101 350
3.49 H.P. L32-4 DE LUXE H/CHANGE Z4 101 Z4 101 350
3.49 H.P. L32-4 DE LUXE FOOT CHANGE Z4 101 Z5 101 350
3.49 H.P. L32-5 OHV BLUE STAR H/CHG Z5 101 Z4 101 350
3.49 H.P. L32-5 OHV BLUE STAR F/CHG Z5 101 Z5 101 350
3.49 H.P. L32-5 OHV DE LUXE H/CHG Z5 101 Z4 101 350
3.49 H.P. L32-5 OHV DE LUXE F/CHG Z5 101 Z5 101 350
3.49 H.P. L32-5 OHV BLUE STAR H/CHG Z11 101 Z4 101 350
3.49 H.P. L32-5 OHV BLUE STAR F/CHG Z11 101 Z5 101 350
4.99 H.P. S32-8 OHV DE LUXE Z8 101 Z8 101 500
4.99 H.P. W32-6 FOOT CHANGE Z6 101 Z7 101 500
4.99 H.P. W32-6 HAND CHANGE Z6 101 Z6 101 500
4.99 H.P. W32-7 OHV BLUE STAR F/CHG Z12 101 Z7 101 500
4.99 H.P. W32-7 OHV BLUE STAR F/CHG Z7 101 Z7 101 500
4.99 H.P. W32-7 OHV BLUE STAR H/CHG Z12 101 Z6 101 500
4.99 H.P. W32-7 OHV BLUE STAR H/CHG Z7 101 Z6 101 500
4.99 H.P. W32-7 OHV FOOT CHANGE Z7 101 Z7 101 500
4.99 H.P. W32-7 OHV HAND/CHANGE Z7 101 Z6 101 500
5.57 H.P. H32-9 DE LUXE Z9 101 Z8 101 550
9.86 H.P. G32-10 Z10 101 Z10 101 1000
         

1933

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
2.49 H.P. B33-1 A1 101 A1 101 250
2.49 H.P. B33-2 OHV S.P. A2 101 A1 101 250
2.49 H.P. B33-3 BLUE STAR JUNIOR A3 101 A3L 101 250
3.48 H.P. R33-4 OHV A4 101 A4 101 350
3.48 H.P. R33-5 OHV BLUE STAR H/CHG A5 101 A4 101 350
3.48 H.P. R33-5 OHV BLUE STAR F/CHG A5 101 A5 101 350
4.99 H.P. W33-6 A6 101 A4 101 500
4.99 H.P. W33-6 POST OFFICE A6 101 A6 101 500
4.99 H.P. W33-7 OHV A7 101 A4 101 500
4.99 H.P. W33-8 OHV BLUE STAR F/CHG A8 101 A5 101 500
4.99 H.P. W33-8 OHV BLUE STAR H/CHG A8 101 A4 101 500
4.99 H.P. W33-9 OHV SPECIAL H/CHG A9 101 A9R 101 500
4.99 H.P. W33-9 OHV SPECIAL F/CHG A9 101 A9L 101 500
5.95 H.P. M33-10 A10 101 A10 101 600
5.95 H.P. M33-11 OHV A11 101 A10 101 600
9.86 H.P. G33-12 TWIN LIGHT A12 101 A?   1000
9.86 H.P. G33-13 TWIN WORLD TOUR A13 101 A13 101 1000
9.98 H.P. G33-14 TWIN WAR OFFICE A14 101 A14 101 1000
         

1934

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
1.49 H.P. X34-0 OHV B150 101 B1 101 150
2.49 H.P. B34-1 B1 101 B1 101 250
2.49 H.P. B34-17 OHV SPORTS B17 101 B3 101 250
2.49 H.P. B34-2 OHV B2 101 B1 101 250
2.49 H.P. B34-3 BLUE STAR JUNIOR B3 101 B3 101 250
3.48 H.P. R34-4 OHV B4 101 B4 101 350
3.48 H.P. R34-5 OHV BLUE STAR B5 101 B4 101 350
3.48 H.P. R34-6 OHV SPECIAL B6 101 B6 101 350
4.99 H.P. W34-7 B7 101 B7 101 500
4.99 H.P. W34-8 OHV B8 101 B4 101 500
4.99 H.P. W34-9 OHV BLUE STAR B9 101 B4 101 500
4.99 H.P. W34-10 OHV SPECIAL B10 101 B6 101 500
4.98 H.P. J34-11 OHV TWIN B11 101 B11 101 500
5.95 H.P. M34-12 B12 101 B12 101 600
5.95 H.P. M34-13 OHV B13 101 B12 101 600
9.86 H.P. G34-14 TWIN WORLD TOUR B14 101 B14 101 1000
         

1935

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
1.49 H.P. X35-0 OHV E0 101 E1 101 150
2.49 H.P. B35-1 E1 101 E1 101 250
2.49 H.P. B35-2 OHV E2 101 E1 101 250
2.49 H.P. B35-3 OHV DE LUXE E3 101 E3 101 250
3.48 H.P. R35-4 OHV DE LUXE E4 101 E3 101 350
3.48 H.P. R35-5 OHV BLUE STAR E5 101 E5 101 350
3.48 H.P. R35-17 OHV Twin Port E17 101 E5 101 350
4.98 H.P. W35-6 E6 101 E6 101 500
4.98 H.P. J35-12 OHV TWIN E12 101 E12 101 500
4.99 H.P. W35-7 OHV E7 101 E5 101 500
4.99 H.P. W35-8 OHV BLUE STAR E8 101 E5 101 500
4.99 H.P. W35-9 OHV SPECIAL E9 101 E9 101 500
5.95 H.P. M35-10 E10 101 E10 101 500
5.95 H.P. M35-11 OHV E11 101 E10 101 600
7.50 H.P. J35-15 OHV TWN WAR OFFICE E15 101 E15 101 750
9.86 H.P. G35-14 TWIN E14 101 E14 101 1000
         

1936

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
1.49 H.P. X0 OHV D0 101 D1 101 150
2.49 H.P. B1 D1 101 D1 101 250
2.49 H.P. B18 OHV LIGHT DE LUXE D18 101 D1 101 250
2.49 H.P. B2 OHV D2 101 D1 101 250
2.49 H.P. B3 OHV DE LUXE D3 101 D3 101 250
3.48 H.P. R4 OHV DE LUXE D4 101 D3 101 350
3.48 H.P. R17 OHV D17 101 D6 101 350
3.48 H.P. R19 OHV COMPETITION D19 101 D3 101 350
3.48 H.P. R20 OHV NEW BLUE STAR D20 101 D6 101 350
3.48 H.P. R5 OHV EMPIRE STAR 3D5 101 D38 1101 350
3.48 H.P. R5 OHV EMPIRE STAR D5 101 D8 101 350
4.96 H.P. Q21 OHV NEW BLUE STAR D21 101 D6 101 500
4.96 H.P. Q7 OHV D7 101 D6 101 500
4.96 H.P. Q8 OHV EMPIRE STAR 3D8 101 D38 1101 500
4.96 H.P. Q8 OHV EMPIRE STAR D8 101 D8 101 500
4.98 H.P. J12 OHV TWIN D12 101 D12 101 500
4.99 H.P. W6 D6 101 D6 101 500
5.95 H.P. M10 D10 101 D10 101 600
7.48 H.P. Y13 OHV TWIN D13 101 D13 101 750
9.86 H.P. G14 TWIN D14 101 D14 101 1000
         

1937

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
B20 TOURER HB20 101 HB20 101 250
B21 OHV SPORTS HB21 101 HB20 101 250
B22 OHV EMPIRE STAR HB22 101 HB20 101 250
B23 TOURER HB23 101 HB20 101 350
B24 OHV EMPIRE STAR HB24 101 HB24 101 350
B25 OHV COMPETITION HB25 101 HB24 101 350
B26 OHV SPORTS HB26 101 HB24 101 350
M19 OHV DE LUXE HM19 101 HM19 101 350
M20 TOURER HM20 101 HM19 101 500
M22 OHV SPORTS HM22 101 HM19 101 500
M23 OHV EMPIRE STAR HM23 101 HM19 101 500
M21 TOURER HM21 101 HM19 101 600
Y13 OHV TWIN HY13 101 HY13 101 750
G14 TWIN HG14 101 HG14 101 1000
         

1938

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
B20 TOURER JB20 101 JB20 101 250
B21 OHV SPORTS JB21 101 JB20 101 250
B22 OHV EMPIRE STAR JB22 101 JB20 101 250
C10 JC10 101 JC10 101 250
C11 JC11 101 JC10 101 250
B23 TOURER JB23 101 JB20 101 350
B24 OHV EMPIRE STAR JB24 101 JB24 101 350
B25 OHV COMPETITION JB25 101 JB24 101 350
B26 OHV SPORTS JB26 101 JB24 101 350
M19 OHV DE LUXE JM19 101 JM19 101 350
M20 TOURER JM20 101 JM19 101 500
M22 OHV SPORTS JM22 101 JM19 101 500
M23 OHV EMPIRE STAR JM23 101 JM19 101 500
M24 GOLD STAR JM24 101 JM24 101 500
M21 TOURER JM21 101 JM19 101 600
Y13 OHV TWIN JY13 101 JY13 101 750
G14 TWIN JG14 101 JG14 101 1000
         

1939

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
B21 DE-LUXE KB21 101 KB20 101 250
B21 STANDARD KJB21 101 KJB20 101 250
C10 DE-LUXE KC10 101 KC10 101 250
C10 STANDARD KJC10 101 KJC10 101 250
C11 KC11 101 KC10 101 250
B23 STANDARD KJB23 101 KJB20 101 350
B25 COMPETITION KB25 101 KB24 101 350
B26 KB26 101 KB24 101 350
B23 DE-LUXE KB23 101 KB20 101 350
B24 SILVER STAR KB24 101 KB24 101 350
M20 DE-LUXE KM20 101 KM20 101 500
M20 STANDARD KMS20 101 KM20 101 500
M22 STANDARD KJM22 101 KJM19 101 500
M23 SILVER STAR KM23 101 KM23 101 500
M24 GOLD STAR KM24 101 KM24 101 500
M21 KM21 101 KM20 101 600
G14 TWIN KG14 101 KG14 101 1000
         

1940

        

Model

Engne prefix

Engine sequence

Frame prefix

Frame sequence

CC
C10 WC10 101 WC10 101 250
C11 WC11 101 WC10 101 250
B29 SILVER SPORTS WB29 101 WB27 101 350
C12 WC12 101 WC10 101 350
W.D.B30 WB30 101 WB30 101 350
M20 WM20 101 WM20 101 500
M23 SILVER STAR WM23 101 WM20 101 500
W.D. M20 WM20 9719 WM20 9719 500
W.D. M20 WM20 14439 WM20 14439 500
W.D. M20 WM20 18899 WM20 18899 500
W.D. M20 WM20 23039 WM20 23039 500
W.D. M20 WM20 27039 WM20 27039 500
M21 WM21 101 WM20 101 600
G14 TWIN WG14 101 WG14 101 1000