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BSA Parts

Motorcycle Pistons
Make Part No. Description
BSA Part no. 8267 +.75 MM BSA - 250cc OHV (C11, C11G, C12) coil ignition, Year: 1939-58.
BSA Part no. 8267 +.020 BSA - 250cc OHV (C11, C11G, C12) coil ignition, Year: 1939-58.
BSA Part no. 2725 +.030 BSA - 249cc OHV (B1, B2, B3, B4) Year: 1930-34.
BSA Part no. AEB 1071 .040 BSA - 1 pair of Big End shells for Barracuda 1967 & Starfire 1969 / petrol engines  B25 & C25 249cc (.040" undersize)
BSA Part no. 8267 +.040 BSA - 250cc OHV (C11, C11G, C12) coil ignition, Year: 1939-58.
BSA Part no. BSA 3327D HEAD SET BSA C15 1959-67
BSA Part no. 8267 +.060 BSA - 250cc OHV (C11, C11G, C12) coil ignition, Year: 1939-58.
BSA Part no. 10739 STD BSA - 500cc (A7, Star Twin), Year: 1949-50, compression ratio 7.5:1.
BSA Part no. BSA 3328 FULL GASKET SET BSA B40 SS90 1961-65
BSA Part no. 10739 +.020 BSA - 500cc (A7, Star Twin), Year: 1949-50, compression ratio 7.5:1.
BSA Part no. 10739 +.030 BSA - 500cc (A7, Star Twin), Year: 1949-50, compression ratio 7.5:1.
BSA Part no. BSA 3328D HEAD SET BSA B40 1961-65
BSA Part no. 10739 +.040 BSA - 500cc (A7, Star Twin), Year: 1949-50, compression ratio 7.5:1.
BSA Part no. BSA 3330 FULL GASKET SET BSA A65 1962-66
BSA Part no. BSA 3330D HEAD SET BSA A65 1960-66
BSA Part no. BSA 3331 FULL GASKET  SET BSA A50T ROYAL 1962-70
BSA Part no. 10739 +.050 BSA - 500cc (A7, Star Twin), Year: 1949-50, compression ratio 7.5:1.
BSA Part no. 17952 +.040 BSA - 173cc (D10 Bantam) Year: 1967, compression ratio 8.6:1, (D14/4 Bantam, D15 Bantam) Year: 1968-69, compression ratio 10:1,   (D175 Bantam) Year: 1970-71, compression ratio 9.5:1
BSA Part no. 12923 +.020 BSA - 148cc (D3, Bantam Major, Two Stroke) Year: 1955-58.
BSA Part no. 10739 +.060 BSA - 500cc (A7, Star Twin), Year: 1949-50, compression ratio 7.5:1.
BSA Part no. 11341 STD BSA - 499cc OHV (B33, B34, B34 Gold Star, M33) Year: 1947-52, compression ratio 6.8:1, long con rod
BSA Part no. BSA 3332 FULL GASKET SET BSA B40 B44 1964-70
BSA Part no. BSA 3332D HEAD SET BSA B40 B44 1964-70
BSA Part no. BSA 3333 FULL GASKET SET BSA D10 BUSHMAN/PASTORIAL 1966-67
BSA Part no. 11341 +.020 BSA - 499cc OHV (B33, B34, B34 Gold Star, M33) Year: 1947-52, compression ratio 6.8:1, long con rod
BSA Part no. 11341 +.040 BSA - 499cc OHV (B33, B34, B34 Gold Star, M33) Year: 1947-52, compression ratio 6.8:1, long con rod
BSA Part no. BSA 3334 FULL GASKET SET BSA A65T/L (COPPER H/GASKET) 1966-70
BSA Part no. 11341 +.060 BSA - 499cc OHV (B33, B34, B34 Gold Star, M33) Year: 1947-52, compression ratio 6.8:1, long con rod
BSA Part no. BSA 3334D HEAD SET BSA A65 1967-70
BSA Part no. BSA 3335 FULL GASKET SET BSA B25 1966-70
BSA Part no. BSA 3335D HEAD SET BSA C25 B25 1966-70
BSA Part no. 11062 STD BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 7.25:1
BSA Part no. 11062 +.020 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 7.25:1
BSA Part no. 1953 +.020 BSA - 770cc  SV Twin (E25, E26, E27, E28, E29, E30-14, E31-11) Year: 1925-31
BSA Part no. 17952 +1.1 MM BSA - 173cc (D10 Bantam) Year: 1967, compression ratio 8.6:1, (D14/4 Bantam, D15 Bantam) Year: 1968-69, compression ratio 10:1,   (D175 Bantam) Year: 1970-71, compression ratio 9.5:1
BSA Part no. BSA 3337 BSA FULL GASKET SET BSA A50T (SOLID COPPER H/GASKET) 1970-71
BSA Part no. 11062 +.040 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 7.25:1
BSA Part no. 11062 +.060 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 7.25:1
BSA Part no. BSA 3338 FULL GASKET SET BSA A65 1971 ON
BSA Part no. 11094 STD BSA - 500cc OHV (A7) Year: 1951-58, compression ratio 6.6:1
BSA Part no. 11094 +.020 BSA - 500cc OHV (A7) Year: 1951-58, compression ratio 6.6:1
BSA Part no. 11744 STD BSA - 499cc OHV (B34, B33, M33) Year late 1952-60, compression ratio 7.5:1/6.5:1 when compression plate fitted,
short con rod.
BSA Part no. 11744 +.040 BSA - 499cc OHV (B34, B33, M33) Year late 1952-60, compression ratio 7.5:1/6.5:1 when compression plate fitted,
short con rod.
BSA Part no. 11094 +.030 BSA - 500cc OHV (A7) Year: 1951-58, compression ratio 6.6:1
BSA Part no. 11094 +.040 BSA - 500cc OHV (A7) Year: 1951-58, compression ratio 6.6:1
BSA Part no. 11094 +.060 BSA - 500cc OHV (A7) Year: 1951-58, compression ratio 6.6:1
BSA Part no. 11062 +.030 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 7.25:1
BSA Part no. 11288 STD BSA - 500cc OHV (A7) Year: 1951-60, high compression ratio 7.25:1
BSA Part no. 12923 +.040 BSA - 148cc (D3, Bantam Major, Two Stroke) Year: 1955-58.
BSA Part no. 12923 +.060 BSA - 148cc (D3, Bantam Major, Two Stroke) Year: 1955-58.
BSA Part no. 11288 +.5 MM BSA - 500cc OHV (A7) Year: 1951-60, high compression ratio 7.25:1
BSA Part no. 11288 +.020 BSA - 500cc OHV (A7) Year: 1951-60, high compression ratio 7.25:1
BSA Part no. 11288 +.040 BSA - 500cc OHV (A7) Year: 1951-60, high compression ratio 7.25:1
BSA Part no. 11288 +.060 BSA - 500cc OHV (A7) Year: 1951-60, high compression ratio 7.25:1
BSA Part no. 12543 +.5 MM BSA - 150cc (D3, Bantam Major, Two Stroke) Year: 1954 on
BSA Part no. BSA 3338D HEAD SET BSA A65 (COPPER H/GASKET)
BSA Part no. 12543 +.015 BSA - 150cc (D3, Bantam Major, Two Stroke) Year: 1954 on
BSA Part no. 12543 +.020 BSA - 150cc (D3, Bantam Major, Two Stroke) Year: 1954 on
BSA Part no. BSA 3339 FULL GASKET SET BSA B50 1971 ON
BSA Part no. 12543 +.020 BSA - 150cc (D3, Bantam Major, Two Stroke) Year: 1954 on
BSA Part no. 12543 +.030 BSA - 150cc (D3, Bantam Major, Two Stroke) Year: 1954 on
BSA Part no. 12543 +.060 BSA - 150cc (D3, Bantam Major, Two Stroke) Year: 1954 on
BSA Part no. 11744 +.020 BSA - 499cc OHV (B34, B33, M33) Year late 1952-60, compression ratio 7.5:1/6.5:1 when compression plate fitted,
short con rod.
BSA Part no. BSA 3340 FULL GASKET SET BSA DB32 GOLD STAR 1953-60
BSA Part no. BSA 3341 FULL GASKET SET BSA A75 1969-72
BSA Part no. 11744 +.060 BSA - 499cc OHV (B34, B33, M33) Year late 1952-60, compression ratio 7.5:1/6.5:1 when compression plate fitted,
short con rod.
BSA Part no. 11412 STD BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 9:1
BSA Part no. 11412 +.020 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 9:1
BSA Part no. 11412 +.040 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 9:1
BSA Part no. 11412 +.060 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 9:1
BSA Part no. 12923 STD BSA - 148cc (D3, Bantam Major, Two Stroke) Year: 1955-58.
BSA Part no. 12659 +.020 BSA - 600cc side valve (M21) Year: 1939-58.
BSA Part no. 18527 STD BSA - 499cc OHV (B34, Gold Star) Year: 1954-62, compression ratio 9:1
BSA Part no. 18527 +.020 BSA - 499cc OHV (B34, Gold Star) Year: 1954-62, compression ratio 9:1
BSA Part no. 18527 +.030 BSA - 499cc OHV (B34, Gold Star) Year: 1954-62, compression ratio 9:1
BSA Part no. 18527 +.040 BSA - 499cc OHV (B34, Gold Star) Year: 1954-62, compression ratio 9:1
BSA Part no. 18527 +.060 BSA - 499cc OHV (B34, Gold Star) Year: 1954-62, compression ratio 9:1
BSA Part no. 11431 +.030 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-58. high compression ratio 8:1
BSA Part no. 11603 STD BSA - 500cc OHV (A7) Year: 1951-60 high compression 8:1, 500cc OHV (A7) Year: 1961-62 high compression 8:1.
BSA Part no. 11603 +.8 MM BSA - 500cc OHV (A7) Year: 1951-60 high compression 8:1, 500cc OHV (A7) Year: 1961-62 high compression 8:1.
BSA Part no. 11603 +.020 BSA - 500cc OHV (A7) Year: 1951-60 high compression 8:1, 500cc OHV (A7) Year: 1961-62 high compression 8:1.
BSA Part no. 11603 +.040 BSA - 500cc OHV (A7) Year: 1951-60 high compression 8:1, 500cc OHV (A7) Year: 1961-62 high compression 8:1.
BSA Part no. 15933 STD BSA - 654cc OHV (A65, A650 Star) Year: 1962-64, compression ratio 7.5:1
BSA Part no. 15933 +.8mm BSA - 654cc OHV (A65, A650 Star) Year: 1962-64, compression ratio 7.5:1
BSA Part no. 15933 +.020 BSA - 654cc OHV (A65, A650 Star) Year: 1962-64, compression ratio 7.5:1
BSA Part no. 15933 +.040 BSA - 654cc OHV (A65, A650 Star) Year: 1962-64, compression ratio 7.5:1
BSA Part no. 15934 STD BSA - 499cc OHV (A50, 500 Star) Year 1962, compression ratio 7.5:1
BSA Part no. 15934 +.75 MM BSA - 499cc OHV (A50, 500 Star) Year 1962, compression ratio 7.5:1
BSA Part no. 15933 +.060 BSA - 654cc OHV (A65, A650 Star) Year: 1962-64, compression ratio 7.5:1
BSA Part no. 15934 +.020 BSA - 499cc OHV (A50, 500 Star) Year 1962, compression ratio 7.5:1
BSA Part no. 15934 +.040 BSA - 499cc OHV (A50, 500 Star) Year 1962, compression ratio 7.5:1
BSA Part no. 15934 +.060 BSA - 499cc OHV (A50, 500 Star) Year 1962, compression ratio 7.5:1
BSA Part no. 15934 +1.5 MM BSA - 499cc OHV (A50, 500 Star) Year 1962, compression ratio 7.5:1
BSA Part no. 15933 +1 MM BSA - 654cc OHV (A65, A650 Star) Year: 1962-64, compression ratio 7.5:1
BSA Part no. 1953 +.040 BSA - 770cc  SV Twin (E25, E26, E27, E28, E29, E30-14, E31-11) Year: 1925-31
BSA Part no. 16283 +.015 BSA - 75cc OHV (Beagle) Year: 1963-64, compression ratio 9:1
BSA Part no. 10399 +.020 BSA - 123cc (D1, Bantam, 2 stroke) Year 1947-63
BSA Part no. 13090 +.5 MM BSA - 348cc OHV (B32 Gold Star) Year: 1955, high compression ratio 9:1
BSA Part no. 13090 +1 MM BSA - 348cc OHV (B32 Gold Star) Year: 1955, high compression ratio 9:1
BSA Part no. 16687 +.020 BSA - 343cc OHV (B40, SS90) Year 1963-65, compression ratio 8.75:1
BSA Part no. 13090 +1.5 MM BSA - 348cc OHV (B32 Gold Star) Year: 1955, high compression ratio 9:1
BSA Part no. 8317 STD BSA - 348cc  OHV (Single Port, B24, B25, Empire Star Competition) Year: 1939
BSA Part no. 8317 + .040 BSA - 348cc  OHV (Single Port, B24, B25, Empire Star Competition) Year: 1939
BSA Part no. 16687 +.030 BSA - 343cc OHV (B40, SS90) Year 1963-65, compression ratio 8.75:1
BSA Part no. 16687 +.040 BSA - 343cc OHV (B40, SS90) Year 1963-65, compression ratio 8.75:1
BSA Part no. 4429 STD BSA - 249cc OHV (Blue Star, B34-3) Year: 1934, compression ratio 7.2:1
BSA Part no. 4429 +.020 BSA - 249cc OHV (Blue Star, B34-3) Year: 1934, compression ratio 7.2:1
BSA Part no. FWT 233 HEAD GASKET BSA A7 500CC 1947-50.      
ADD TO PART NO. BSA 3320 TO MAKE FULL SET
BSA Part no. 12010 +.020 BSA - 499cc OHV (B33, B34, B34 Gold Star, M33) Year: 1947-52, compression ratio 8.5:1, long con rod

 

BSA Part no. 12010 +.040 BSA - 499cc OHV (B33, B34, B34 Gold Star, M33) Year: 1947-52, compression ratio 8.5:1, long con rod
BSA Part no. 12010 +.060 BSA - 499cc OHV (B33, B34, B34 Gold Star, M33) Year: 1947-52, compression ratio 8.5:1, long con rod
BSA Part no. 2725 +.040 BSA - 249cc OHV (B1, B2, B3, B4) Year: 1930-34.
BSA Part no. 10399 +.060 BSA - 123cc (D1, Bantam, 2 stroke) Year 1947-63
BSA Part no. 2725 +.060 BSA - 249cc OHV (B1, B2, B3, B4) Year: 1930-34.
BSA Part no. 8267 +.030 BSA - 250cc OHV (C11, C11G, C12) coil ignition, Year: 1939-58.
BSA Part no. 3653 +.020 BSA - 249cc OHV High Comp (B30-4, B31-3, B31-2, B32-1, B33-2) Year: 1930-33.
BSA Part no. 3653 +.030 BSA - 249cc OHV High Comp (B30-4, B31-3, B31-2, B32-1, B33-2) Year: 1930-33.
BSA Part no. 4429 +.040 BSA - 249cc OHV (Blue Star, B34-3) Year: 1934, compression ratio 7.2:1
BSA Part no. AEB 2046 STD BSA - 2 pairs of Big End shells for BSA Road Rocket after engine no. CA10/R6078, Golden Flash after eng no. DA10/1168, 1958 on, A10 Super Road Rocket, 650cc engines.  (STD size)
BSA Part no. AEB 2046 .010 BSA - 2 pairs of Big End shells for BSA Road Rocket after engine no. CA10/R6078, Golden Flash after eng no. DA10/1168, 1958 on, A10 Super Road Rocket, 650cc engines.  (.010 undersize)
BSA Part no. AEB 2046 .020 BSA - 2 pairs of Big End shells for BSA Road Rocket after engine no. CA10/R6078, Golden Flash after eng no. DA10/1168, 1958 on, A10 Super Road Rocket, 650cc engines.  (.020 undersize)
BSA Part no. AEB 2046 .030 BSA - 2 pairs of Big End shells for BSA Road Rocket after engine no. CA10/R6078, Golden Flash after eng no. DA10/1168, 1958 on, A10 Super Road Rocket, 650cc engines.  (.030 undersize)
BSA Part no. AEB 2046 .040 BSA - 2 pairs of Big End shells for BSA Road Rocket after engine no. CA10/R6078, Golden Flash after eng no. DA10/1168, 1958 on, A10 Super Road Rocket, 650cc engines.  (.040 undersize)
BSA Part no. AEB 2046 .050 BSA - 2 pairs of Big End shells for BSA Road Rocket after engine no. CA10/R6078, Golden Flash after eng no. DA10/1168, 1958 on, A10 Super Road Rocket, 650cc engines.  (.050 undersize)
BSA Part no. 7123 STD BSA - 348cc OHV single port (B24, B25, Empire Star Competition) Year: 1937
BSA Part no. AEB 2046 .060 BSA - 2 pairs of Big End shells for BSA Road Rocket after engine no. CA10/R6078, Golden Flash after eng no. DA10/1168, 1958 on, A10 Super Road Rocket, 650cc engines.  (.060 undersize)
BSA Part no. BSA 3319 FULL GASKET SET BSA M20/21 1950-61
BSA Part no. 7123 +.040 BSA - 348cc OHV single port (B24, B25, Empire Star Competition) Year: 1937
BSA Part no. 7878 +.040 BSA - 348cc OHV single port (B24, B25, Empire Star  & Competition) Year: 1938
BSA Part no. 15504 STD BSA - 348cc  OHV (De Luxe Single Port, R35-4, R36-17) Year: 1935-36,
(B23) Year: 1939, (B26, C23) Year: 1940,
(B30WD, C12) Year: 1941, (B301, B32) Year 1946-59. compression ratio 6.5:1.
BSA Part no. 11603 +.060 BSA - 500cc OHV (A7) Year: 1951-60 high compression 8:1, 500cc OHV (A7) Year: 1961-62 high compression 8:1.
BSA Part no. 11431 STD BSA - 650cc OHV (A10, Golden Flash) Year: 1950-58. high compression ratio 8:1
BSA Part no. 11431 +.020 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-58. high compression ratio 8:1
BSA Part no. 11062 +.080 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-59, high compression 7.25:1
BSA Part no. 11431 +.040 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-58. high compression ratio 8:1
BSA Part no. 11431 +.060 BSA - 650cc OHV (A10, Golden Flash) Year: 1950-58. high compression ratio 8:1
BSA Part no. 12659 STD BSA - 600cc side valve (M21) Year: 1939-58.
BSA Part no. 12659 +.5 MM BSA - 600cc side valve (M21) Year: 1939-58.
BSA Part no. 17952 +.060 BSA - 173cc (D10 Bantam) Year: 1967, compression ratio 8.6:1, (D14/4 Bantam, D15 Bantam) Year: 1968-69, compression ratio 10:1,   (D175 Bantam) Year: 1970-71, compression ratio 9.5:1
BSA Part no. 12659 +.75 MM BSA - 600cc side valve (M21) Year: 1939-58.
BSA Part no. 19233 +.080 BSA - 654cc OHV (A65, 650 Star) Year: 1962-65. (A65R Rocket, A65L Lightning, A65T Thunderbolt,
A65SS Spitfire, A65FS Firebird Scrambler) Year: 1964-71. compression ratio 9:1.
BSA Part no. 12659 +.040 BSA - 600cc side valve (M21) Year: 1939-58.
BSA Part no. 12659 +1.5 MM BSA - 600cc side valve (M21) Year: 1939-58.
BSA Part no. 16945 STD BSA - 249cc OHV (C25 Barracuda) 1967-68 (B25 Starfire) 1969-71 compression ratio 9.5:1.
1971 (Gold Star 250SS, B25SS, Vlctor 250 B25T) compression ratio 10:1.
BSA Part no. 16945 +.020 BSA - 249cc OHV (C25 Barracuda) 1967-68 (B25 Starfire) 1969-71 compression ratio 9.5:1.
1971 (Gold Star 250SS, B25SS, Vlctor 250 B25T) compression ratio 10:1.
BSA Part no. 12010 STD BSA - 499cc OHV (B33, B34, B34 Gold Star, M33) Year: 1947-52, compression ratio 8.5:1, long con rod
BSA Part no. 5116 STD BSA - 1075cc Three Wheeler, Year: 1933-35.
BSA Part no. 16945 +.040 BSA - 249cc OHV (C25 Barracuda) 1967-68 (B25 Starfire) 1969-71 compression ratio 9.5:1.
1971 (Gold Star 250SS, B25SS, Vlctor 250 B25T) compression ratio 10:1.
BSA Part no. 16945 +.060 BSA - 249cc OHV (C25 Barracuda) 1967-68 (B25 Starfire) 1969-71 compression ratio 9.5:1.
1971 (Gold Star 250SS, B25SS, Vlctor 250 B25T) compression ratio 10:1.
BSA Part no. 18528 STD BSA - 249cc  OHV (C15, 250 Star), Year: 1959-64, compression ratio 10:1.
BSA Part no. 17293 STD BSA - 173cc (D5, D7, Bantam Super, Silver Bantam, B1 Sunbeam
2 stroke) Year: 1958-66, compression ratio 7.5:1
BSA Part no. 15544 STD BSA - 343cc OHV (B40, 350 Star) Year: 1961-62, compression ratio 7:1
BSA Part no. 5116 +.020 BSA - 1075cc Three Wheeler, Year: 1933-35.
BSA Part no. 5116 +.030 BSA - 1075cc Three Wheeler, Year: 1933-35.
BSA Part no. 17293 +.020 BSA - 173cc (D5, D7, Bantam Super, Silver Bantam, B1 Sunbeam
2 stroke) Year: 1958-66, compression ratio 7.5:1
BSA Part no. 5116 +.040 BSA - 1075cc Three Wheeler, Year: 1933-35.
BSA Part no. 17293 +.040 BSA - 173cc (D5, D7, Bantam Super, Silver Bantam, B1 Sunbeam
2 stroke) Year: 1958-66, compression ratio 7.5:1
BSA Part no. 16945 +.030 BSA - 249cc OHV (C25 Barracuda) 1967-68 (B25 Starfire) 1969-71 compression ratio 9.5:1.
1971 (Gold Star 250SS, B25SS, Vlctor 250 B25T) compression ratio 10:1.
BSA Part no. 1404 STD BSA - 493cc SV (S25, S26, S27, S28, S29, S30-9, S31-7) Year: 1925-31
BSA Part no. 4963 STD BSA - 249cc OHV (B33-3, Blue Star Junior) Year: 1933
BSA Part no. 4963 +.030 BSA - 249cc OHV (B33-3, Blue Star Junior) Year: 1933
BSA Part no. 5116 +.060 BSA - 1075cc Three Wheeler, Year: 1933-35.
BSA Part no. 4963 +.060 BSA - 249cc OHV (B33-3, Blue Star Junior) Year: 1933
BSA Part no. 10399 +.040 BSA - 123cc (D1, Bantam, 2 stroke) Year 1947-63
BSA Part no. 15137 STD BSA - 249cc OHV ((C15, 250 Star) Year: 1959 on. compression ratio 7.5:1.
BSA Part no. 15137 +.020 BSA - 249cc OHV ((C15, 250 Star) Year: 1959 on. compression ratio 7.5:1.
BSA Part no. 15137 +.040 BSA - 249cc OHV ((C15, 250 Star) Year: 1959 on. compression ratio 7.5:1.
BSA Part no. 15137 +.060 BSA - 249cc OHV ((C15, 250 Star) Year: 1959 on. compression ratio 7.5:1.
BSA Part no. 19233 STD BSA - 654cc OHV (A65, 650 Star) Year: 1962-65. (A65R Rocket, A65L Lightning, A65T Thunderbolt,
A65SS Spitfire, A65FS Firebird Scrambler) Year: 1964-71. compression ratio 9:1.
BSA Part no. 19233 +.6 MM BSA - 654cc OHV (A65, 650 Star) Year: 1962-65. (A65R Rocket, A65L Lightning, A65T Thunderbolt,
A65SS Spitfire, A65FS Firebird Scrambler) Year: 1964-71. compression ratio 9:1.
BSA Part no. 19233 +.8 MM BSA - 654cc OHV (A65, 650 Star) Year: 1962-65. (A65R Rocket, A65L Lightning, A65T Thunderbolt,
A65SS Spitfire, A65FS Firebird Scrambler) Year: 1964-71. compression ratio 9:1.
BSA Part no. 15544 +.020 BSA - 343cc OHV (B40, 350 Star) Year: 1961-62, compression ratio 7:1
BSA Part no. 15544 +.040 BSA - 343cc OHV (B40, 350 Star) Year: 1961-62, compression ratio 7:1
BSA Part no. 15544 +.060 BSA - 343cc OHV (B40, 350 Star) Year: 1961-62, compression ratio 7:1
BSA Part no. 19233 +.020 BSA - 654cc OHV (A65, 650 Star) Year: 1962-65. (A65R Rocket, A65L Lightning, A65T Thunderbolt,
A65SS Spitfire, A65FS Firebird Scrambler) Year: 1964-71. compression ratio 9:1.
BSA Part no. 19233 +.040 BSA - 654cc OHV (A65, 650 Star) Year: 1962-65. (A65R Rocket, A65L Lightning, A65T Thunderbolt,
A65SS Spitfire, A65FS Firebird Scrambler) Year: 1964-71. compression ratio 9:1.
BSA Part no. BSA 3300 FULL GASKET SET BSA D1 1954
BSA Part no. 19233 +.060 BSA - 654cc OHV (A65, 650 Star) Year: 1962-65. (A65R Rocket, A65L Lightning, A65T Thunderbolt,
A65SS Spitfire, A65FS Firebird Scrambler) Year: 1964-71. compression ratio 9:1.
BSA Part no. 17293 +.060 BSA - 173cc (D5, D7, Bantam Super, Silver Bantam, B1 Sunbeam
2 stroke) Year: 1958-66, compression ratio 7.5:1
BSA Part no. 17791 STD BSA - 441cc OHV (B44, Shooting Star) Year: 1967-69 compression ratio 9.4:1.
BSA Part no. BSA 3301 FULL GASKET SET BSA D1 1955-63
BSA Part no. 17791 +.020 BSA - 441cc OHV (B44, Shooting Star) Year: 1967-69 compression ratio 9.4:1.
BSA Part no. BSA 3303 FULL GASKET SET BSA C10 1939-53
BSA Part no. BSA 3304 FULL GASKET SET BSA C10L 1954-58
BSA Part no. BSA 3305 FULL GASKET SET BSA C11 1939-53
BSA Part no. BSA 3306 FULL GASKET SET BSA C11G 1954-55
BSA Part no. BSA 3309 FULL GASKET SET BSA B31/32 ALLOY H. 1950-61
BSA Part no. 17791 +.060 BSA - 441cc OHV (B44, Shooting Star) Year: 1967-69 compression ratio 9.4:1.
BSA Part no. BSA 3310 FULL GASKET SET BSA B32 GOLD STAR 1949-52
BSA Part no. BSA 3312 FULL GASKET SET BSA B33/B34 M33 1947-60
BSA Part no. 17952 STD BSA - 173cc (D10 Bantam) Year: 1967, compression ratio 8.6:1, (D14/4 Bantam, D15 Bantam) Year: 1968-69, compression ratio 10:1,   (D175 Bantam) Year: 1970-71, compression ratio 9.5:1
BSA Part no. BSA 3313 FULL GASKET SET BSA B33/B34 ALLOY HEAD 1960-63
BSA Part no. 17791 +.040 BSA - 441cc OHV (B44, Shooting Star) Year: 1967-69 compression ratio 9.4:1.
BSA Part no. 19257 STD BSA - 500cc OHV (Victor 500, B50MX, B50T, Gold Star B50SS) Year: 1971 on, compression ratio 10:1.
BSA Part no. 19257 +.020 BSA - 500cc OHV (Victor 500, B50MX, B50T, Gold Star B50SS) Year: 1971 on, compression ratio 10:1.
BSA Part no. 15504 +.020 BSA - 348cc  OHV (De Luxe Single Port, R35-4, R36-17) Year: 1935-36,
(B23) Year: 1939, (B26, C23) Year: 1940,
(B30WD, C12) Year: 1941, (B301, B32) Year 1946-59. compression ratio 6.5:1.
BSA Part no. 19257 +.030 BSA - 500cc OHV (Victor 500, B50MX, B50T, Gold Star B50SS) Year: 1971 on, compression ratio 10:1.
BSA Part no. BSA 3314 FULL GASKET SET BSA A7 1947-50
BSA Part no. BSA 3315 FULL GASKET SET BSA A7 1951-54
BSA Part no. 1953 +.060 BSA - 770cc  SV Twin (E25, E26, E27, E28, E29, E30-14, E31-11) Year: 1925-31
BSA Part no. 19257 +.040 BSA - 500cc OHV (Victor 500, B50MX, B50T, Gold Star B50SS) Year: 1971 on, compression ratio 10:1.
BSA Part no. 19257 +.060 BSA - 500cc OHV (Victor 500, B50MX, B50T, Gold Star B50SS) Year: 1971 on, compression ratio 10:1.
BSA Part no. 7150 STD BSA - 250cc side valve (B1, B20, C10, C10L), Year: 1933-57,
250cc OHV (B2, B18) Year: 1935-36.
BSA Part no. 7150 +.010 BSA - 250cc side valve (B1, B20, C10, C10L), Year: 1933-57,
250cc OHV (B2, B18) Year: 1935-36.
BSA Part no. 7150 +.020 BSA - 250cc side valve (B1, B20, C10, C10L), Year: 1933-57,
250cc OHV (B2, B18) Year: 1935-36.
BSA Part no. 1404 +.040 BSA - 493cc SV (S25, S26, S27, S28, S29, S30-9, S31-7) Year: 1925-31
BSA Part no. 7150 +.030 BSA - 250cc side valve (B1, B20, C10, C10L), Year: 1933-57,
250cc OHV (B2, B18) Year: 1935-36.
BSA Part no. BSA 3318 FULL GASKET SET BSA M20/21 1939-49
BSA Part no. 7150 +.040 BSA - 250cc side valve (B1, B20, C10, C10L), Year: 1933-57,
250cc OHV (B2, B18) Year: 1935-36.
BSA Part no. 7150 +.060 BSA - 250cc side valve (B1, B20, C10, C10L), Year: 1933-57,
250cc OHV (B2, B18) Year: 1935-36.
BSA Part no. 15504 +.8 MM BSA - 348cc  OHV (De Luxe Single Port, R35-4, R36-17) Year: 1935-36,
(B23) Year: 1939, (B26, C23) Year: 1940,
(B30WD, C12) Year: 1941, (B301, B32) Year 1946-59. compression ratio 6.5:1.
BSA Part no. 15504 +.030 BSA - 348cc  OHV (De Luxe Single Port, R35-4, R36-17) Year: 1935-36,
(B23) Year: 1939, (B26, C23) Year: 1940,
(B30WD, C12) Year: 1941, (B301, B32) Year 1946-59. compression ratio 6.5:1.
BSA Part no. 15504 +.040 BSA - 348cc  OHV (De Luxe Single Port, R35-4, R36-17) Year: 1935-36,
(B23) Year: 1939, (B26, C23) Year: 1940,
(B30WD, C12) Year: 1941, (B301, B32) Year 1946-59. compression ratio 6.5:1.
BSA Part no. 15504 +.060 BSA - 348cc  OHV (De Luxe Single Port, R35-4, R36-17) Year: 1935-36,
(B23) Year: 1939, (B26, C23) Year: 1940,
(B30WD, C12) Year: 1941, (B301, B32) Year 1946-59. compression ratio 6.5:1.
BSA Part no. 15504 +.080 BSA - 348cc  OHV (De Luxe Single Port, R35-4, R36-17) Year: 1935-36,
(B23) Year: 1939, (B26, C23) Year: 1940,
(B30WD, C12) Year: 1941, (B301, B32) Year 1946-59. compression ratio 6.5:1.
BSA Part no. 15504 +1.6 MM BSA - 348cc  OHV (De Luxe Single Port, R35-4, R36-17) Year: 1935-36,
(B23) Year: 1939, (B26, C23) Year: 1940,
(B30WD, C12) Year: 1941, (B301, B32) Year 1946-59. compression ratio 6.5:1.
BSA Part no. 7110 STD BSA - 350cc OHV (Deluxe, M19) Year: 1937-38
BSA Part no. 7110 +.020 BSA - 350cc OHV (Deluxe, M19) Year: 1937-38
BSA Part no. 1953 STD BSA - 770cc SV twin (E25, E26, E27, E28, E29, E30-14, E31-11) Year: 1925-31
BSA Part no. BSA 3320 FULL GASKET SET BSA A10 (HEAD GSKT NOT INCL) 1950-62.
SEPERATE HEAD GASKET IS PART NO. FWT 233             
SEE BSA3320A FOR SET WITH H/GASKET
BSA Part no. 7110 +.040 BSA - 350cc OHV (Deluxe, M19) Year: 1937-38
BSA Part no. 18528 +.75 MM BSA - 249cc  OHV (C15, 250 Star), Year: 1959-64, compression ratio 10:1.
BSA Part no. BSA 3320C FULL GASKET SET BSA A10 G/FLASH WITH COPPER H/GASKET
BSA Part no. 7110 +.060 BSA - 350cc OHV (Deluxe, M19) Year: 1937-38
BSA Part no. 11957 STD BSA - 496cc side valve (WD, M20) Year: 1937-55 compression ratio 4.9:1
BSA Part no. BSA 3321 FULL GASKET SET BSA B34 1956-63
BSA Part no. AEB 1071 .010 BSA - 1 pair of Big End shells for Barracuda 1967 & Starfire 1969 / petrol engines  B25 & C25 249cc (.010" undersize)
BSA Part no. BSA 3325C FULL GASKET SET BSA A10 SUPER ROCKET 1956-63
BSA Part no. 11957 +.5 MM BSA - 496cc side valve (WD, M20) Year: 1937-55 compression ratio 4.9:1
BSA Part no. AEB 1071 .020 BSA - 1 pair of Big End shells for Barracuda 1967 & Starfire 1969 / petrol engines  B25 & C25 249cc (.020" undersize)
BSA Part no. AEB 1071 .030 BSA - 1 pair of Big End shells for Barracuda 1967 & Starfire 1969 / petrol engines  B25 & C25 249cc (.030" undersize)
BSA Part no. 11957 +.75 MM BSA - 496cc side valve (WD, M20) Year: 1937-55 compression ratio 4.9:1
BSA Part no. 10399 STD BSA - 123cc (D1, Bantam, 2 stroke) Year 1947-63
BSA Part no. 11957 +.020 BSA - 496cc side valve (WD, M20) Year: 1937-55 compression ratio 4.9:1
BSA Part no. 17952 +.020 BSA - 173cc (D10 Bantam) Year: 1967, compression ratio 8.6:1, (D14/4 Bantam, D15 Bantam) Year: 1968-69, compression ratio 10:1,   (D175 Bantam) Year: 1970-71, compression ratio 9.5:1
BSA Part no. 11957 +.040 BSA - 496cc side valve (WD, M20) Year: 1937-55 compression ratio 4.9:1
BSA Part no. 11957 +.060 BSA - 496cc side valve (WD, M20) Year: 1937-55 compression ratio 4.9:1
BSA Part no. BSA 3325CD HEAD SET BSA A10 S/ARM
BSA Part no. 11957 +1 MM BSA - 496cc side valve (WD, M20) Year: 1937-55 compression ratio 4.9:1
BSA Part no. 8267 STD BSA - 250cc OHV (C11, C11G, C12) coil ignition, Year: 1939-58.
BSA Part no. BSA 3326 FULL GASKET SET BSA D5/D7 SUPER 1958-66
BSA Part no. BSA 3327 FULL GASKET SET BSA C15/SS80 1957 ON
BSA Part no. AEB 2024 STD BSA/Ariel - 2 pairs of Big End shells for BSA A7, A10, Star twin, Shooting Star, Golden Flash, Super Rocket 1950-55, 500cc & 600cc engines. Ariel Huntsmaster twin 1954-58, 500cc engines (smaller journal).  (STD size)
BSA Part no. AEB 2024 .040 BSA/Ariel - 2 pairs of Big End shells for BSA A7, A10, Star twin, Shooting Star, Golden Flash, Super Rocket 1950-55, 500cc & 600cc engines. Ariel Huntsmaster twin 1954-58, 500cc engines (smaller journal).  (.040" undersize)
BSA Part no. AEB 2024 .030 BSA/Ariel - 2 pairs of Big End shells for BSA A7, A10, Star twin, Shooting Star, Golden Flash, Super Rocket 1950-55, 500cc & 600cc engines. Ariel Huntsmaster twin 1954-58, 500cc engines (smaller journal).  (.030" undersize)
BSA Part no. AEB 2024 .020 BSA/Ariel - 2 pairs of Big End shells for BSA A7, A10, Star twin, Shooting Star, Golden Flash, Super Rocket 1950-55, 500cc & 600cc engines. Ariel Huntsmaster twin 1954-58, 500cc engines (smaller journal).  (.020" undersize)
BSA Part no. AEB 2024 .010 BSA/Ariel - 2 pairs of Big End shells for BSA A7, A10, Star twin, Shooting Star, Golden Flash, Super Rocket 1950-55, 500cc & 600cc engines. Ariel Huntsmaster twin 1954-58, 500cc engines (smaller journal).  (.010" undersize)
BSA Part no. AEB 2048 .030 BSA/Triumph - 2 pairs of Big End shells for B2, B25 scooter twin 1959 on, 250cc OHV engines. Tigress scooter, TS1, TW2 & TW25, 173cc & 249cc 2 stroke engines.  (.030 undersize)
BSA Part no. AEB 2048 .040 BSA/Triumph - 2 pairs of Big End shells for B2, B25 scooter twin 1959 on, 250cc OHV engines. Tigress scooter, TS1, TW2 & TW25, 173cc & 249cc 2 stroke engines.  (.040 undersize)
BSA Part no. AEM 2098 .040 BSA/Triumph - 2 pairs of Mains bearing shells A75 Rocket 3 1969 on, 740cc, 3 cylinder engines. T150 Trident 1969 on, 740cc 3 cylinder engines.  (.040" undersize)
BSA Part no. AEM 2098 STD BSA/Triumph - 2 pairs of Mains bearing shells A75 Rocket 3 1969 on, 740cc, 3 cylinder engines. T150 Trident 1969 on, 740cc 3 cylinder engines.  (STD size)
BSA Part no. AEB 3053 STD BSA/Triumph - 3 pairs of Big End shells for A75 Rocket 3 1969 on, 740cc, 3 cylinder engines. T150 trident 1969 on, 3 cylinder engines.  (STD size)
BSA Part no. AEB 3053 .010 BSA/Triumph - 3 pairs of Big End shells for A75 Rocket 3 1969 on, 740cc, 3 cylinder engines. T150 trident 1969 on, 3 cylinder engines.  (.010" undersize)
BSA Part no. AEB 3053 .020 BSA/Triumph - 3 pairs of Big End shells for A75 Rocket 3 1969 on, 740cc, 3 cylinder engines. T150 trident 1969 on, 3 cylinder engines.  (.020" undersize)
BSA Part no. AEB 3053 .030 BSA/Triumph - 3 pairs of Big End shells for A75 Rocket 3 1969 on, 740cc, 3 cylinder engines. T150 trident 1969 on, 3 cylinder engines.  (.030" undersize)
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