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AJS Parts

Motorcycle Pistons
Make Part No. Description
AJS Part no. 10049 +.020 AJS - 16M, OHV 347cc, Year: 1947
AJS Part no. 5041 +.030 AJS - 495cc OHC Year: 1934-36, competition model 34/10, 35/10, 36/10, compression ratio 6:1
AJS Part no. 11786 +.060 AJS - 498cc OHV (Model 18) Year: 1947-55, compression ratio 7.2:1
Matchless - 498cc OHV (G80) compression ratio 8.5:1 with compression plate removed.
AJS Part no. 15151 +.030 AJS - 348cc OHV (Model 8) Year 1960-62, compression ratio 7.4:1
AJS Part no. 15710 +.060 AJS - 497cc OHV (18CS) Year 1960, compression ratio 8.8:1
AJS Part no. 15036 +.060 AJS - 646cc OHV (31CS, 31CSR) Year 1958-60,
compression ratio  8.5:1 (bore 72mm)
AJS Part no. 2471 +1 MM AJS - 799cc Side Valve, Year: 1923-27 (model Twin, D1, D2, E1, E2, G1, G2, H1, H2) ring below pin.
AJS Part no. 19488 +.030 AJS  - 745cc OHV (Model 33) compression ratio 7.5:1, Year: 1965-67.
AJS Part no. 15710 +.040 AJS - 497cc OHV (18CS) Year 1960, compression ratio 8.8:1
AJS Part no. 5498 +.030 AJS - 346cc OHC Year: 1934-36(competition model 34/7, 35/7, 36/7, compression ratio 6:1
AJS Part no. 15762 +.5 MM AJS - 646cc OHV (31 Swift) Year 60-62, compression ratio 7.5:1
AJS Part no. 5498 +.040 AJS - 346cc OHC Year: 1934-36 (competition model 34/7, 35/7, 36/7, compression ratio 6:1
AJS Part no. 19488 +1.6 MM AJS  - 745cc OHV (Model 33) compression ratio 7.5:1, Year: 1965-67.
AJS Part no. 15762 +.6 MM AJS - 646cc OHV (31 Swift) Year 60-62, compression ratio 7.5:1
AJS Part no. 5499 +.020 AJS - 495cc OHC Year: 1934-36 (racing model 34/10, 35/10, 36/10, compression ratio 11:1
AJS Part no. 5499 +.030 AJS - 495cc OHC Year: 1934-36 (racing model 34/10, 35/10, 36/10, compression ratio 11:1
AJS Part no. 19488 +.020 Left Hand AJS  - 745cc OHV (Model 33) compression ratio 7.5:1, Year: 1965-67.
AJS Part no. 15762 +1.5 MM AJS - 646cc OHV (31 Swift) Year 60-62, compression ratio 7.5:1
AJS Part no. 16023 STD AJS - 650cc OHV (31CS, 31CSR, Hurricane) Year 1960-66, compression ratio 8.5:1
AJS Part no. 16023 +.020 AJS - 650cc OHV (31CS, 31CSR, Hurricane) Year 1960-66, compression ratio 8.5:1
AJS Part no. 16023 +.030 AJS - 650cc OHV (31CS, 31CSR, Hurricane) Year 1960-66, compression ratio 8.5:1
AJS Part no. 16023 +.040 AJS - 650cc OHV (31CS, 31CSR, Hurricane) Year 1960-66, compression ratio 8.5:1
AJS Part no. 16023 +.060 AJS - 650cc OHV (31CS, 31CSR, Hurricane) Year 1960-66, compression ratio 8.5:1
AJS Part no. 9991 STD AJS -498cc OHV (Model 18) Year: 1946, compression ratio 7.2:1
Matchless - 498cc OHV (G5, G80, G90, Clubman) Year: 1938-46
AJS Part no. 9991 +.020 AJS -498cc OHV (Model 18) Year: 1946, compression ratio 7.2:1
Matchless - 498cc OHV (G5, G80, G90, Clubman) Year: 1938-46
AJS Part no. 9991 +.030 AJS -498cc OHV (Model 18) Year: 1946, compression ratio 7.2:1
Matchless - 498cc OHV (G5, G80, G90, Clubman) Year: 1938-46
AJS Part no. 9991 +.040 AJS -498cc OHV (Model 18) Year: 1946, compression ratio 7.2:1
Matchless - 498cc OHV (G5, G80, G90, Clubman) Year: 1938-46
AJS Part no. 19488 +.020 Right Hand AJS  - 745cc OHV (Model 33) compression ratio 7.5:1, Year: 1965-67.
AJS Part no. 11221 STD AJS - 498cc OHV (Model 20, Spring Twin) Year: 1949-55
compression ratio 8:1 (high comp for 12475)
AJS Part no. 15151 +.040 AJS - 348cc OHV (Model 8) Year 1960-62, compression ratio 7.4:1
Matchless - 348cc OHV (G5)
AJS Part no. 7621 STD AJS - 346cc OHC Year: 1934-36(model 34/7, 35/7, 36/7, high comp compression ratio 11:1
AJS Part no. 11786 STD AJS - 498cc OHV (Model 18) Year: 1947-55, compression ratio 7.2:1
Matchless - 498cc OHV (G80) compression ratio 8.5:1 with compression plate removed.
AJS Part no. 7621 +.030 AJS - 346cc OHC Year: 1934-36(model 34/7, 35/7, 36/7, high comp compression ratio 11:1
AJS Part no. 9990 STD AJS - 347cc OHC (16, 16M, 26, 26SS, 26T, Silver Streak) Year: 1935-46, single & 2 port.
AJS Part no. 9990 +.75 MM AJS - 347cc OHC (16, 16M, 26, 26SS, 26T, Silver Streak) Year: 1935-46, single & 2 port.
AJS Part no. 9990 +.020 AJS - 347cc OHC (16, 16M, 26, 26SS, 26T, Silver Streak) Year: 1935-46, single & 2 port.
AJS Part no. 9990 +.030 AJS - 347cc OHC (16, 16M, 26, 26SS, 26T, Silver Streak) Year: 1935-46, single & 2 port.
AJS Part no. 9990 +.040 AJS - 347cc OHC (16, 16M, 26, 26SS, 26T, Silver Streak) Year: 1935-46, single & 2 port.
AJS Part no. 9990 +.060 AJS - 347cc OHC (16, 16M, 26, 26SS, 26T, Silver Streak) Year: 1935-46, single & 2 port.
AJS Part no. 12475 STD AJS - 498cc OHV (20, Spring Twin) Year: 1949-55, compression ratio 7:1
AJS Part no. 7621 +.040 AJS - 346cc OHC Year: 1934-36(model 34/7, 35/7, 36/7, high comp compression ratio 11:1
AJS Part no. 12475 +.020 AJS - 498cc OHV (20, Spring Twin) Year: 1949-55, compression ratio 7:1
AJS Part no. 12475 +.030 AJS - 498cc OHV (20, Spring Twin) Year: 1949-55, compression ratio 7:1
AJS Part no. 12475 +.040 AJS - 498cc OHV (20, Spring Twin) Year: 1949-55, compression ratio 7:1
AJS Part no. 12475 +.060 AJS - 498cc OHV (20, Spring Twin) Year: 1949-55, compression ratio 7:1
AJS Part no. 13380 STD AJS - 497cc OHV (18CS) Year: 1956-58, compression ratio 8.7:1
AJS Part no. 13380 +.020 AJS - 497cc OHV (18CS) Year: 1956-58, compression ratio 8.7:1
AJS Part no. 13380 +.030 AJS - 497cc OHV (18CS) Year: 1956-58, compression ratio 8.7:1
AJS Part no. 13380 +.040 AJS - 497cc OHV (18CS) Year: 1956-58, compression ratio 8.7:1
AJS Part no. 13380 +.060 AJS - 497cc OHV (18CS) Year: 1956-58, compression ratio 8.7:1
AJS Part no. 13267 STD AJS - 498cc OHV (20) Year: 1956-60, compression ratio 7.8:1
AJS Part no. 10049 +.030 AJS - 16M, OHV 347cc, Year: 1947
AJS Part no. 13267 +.020 AJS - 498cc OHV (20) Year: 1956-60, compression ratio 7.8:1
AJS Part no. 13267 +.030 AJS - 498cc OHV (20) Year: 1956-60, compression ratio 7.8:1
AJS Part no. 13267 +.040 AJS - 498cc OHV (20) Year: 1956-60, compression ratio 7.8:1
AJS Part no. 13267 +.060 AJS - 498cc OHV (20) Year: 1956-60, compression ratio 7.8:1
AJS Part no. 13267 +1 MM AJS - 498cc OHV (20) Year: 1956-60, compression ratio 7.8:1
AJS Part no. 13267 +1.5 MM AJS - 498cc OHV (20) Year: 1956-60, compression ratio 7.8:1
AJS Part no. 13266 STD AJS - 498cc OHV (18S) Year: 1956-68, compression ratio 7.3:1
AJS Part no. 13266 +.020 AJS - 498cc OHV (18S) Year: 1956-68, compression ratio 7.3:1
AJS Part no. 13266 +.030 AJS - 498cc OHV (18S) Year: 1956-68, compression ratio 7.3:1
AJS Part no. 13266 +.040 AJS - 498cc OHV (18S) Year: 1956-68, compression ratio 7.3:1
AJS Part no. 2471 +1.5 MM AJS - 799cc Side Valve, Year: 1923-27 (model Twin, D1, D2, E1, E2, G1, G2, H1, H2) ring below pin.
AJS Part no. 13266 +.060 AJS - 498cc OHV (18S) Year: 1956-68, compression ratio 7.3:1
AJS Part no. 18506 STD AJS - 248cc OHV (Model 14) Year: 1959-64, compression ratio 7.8:1
AJS Part no. 18506 +.020 AJS - 248cc OHV (Model 14) Year: 1959-64, compression ratio 7.8:1
AJS Part no. 18506 +.030 AJS - 248cc OHV (Model 14) Year: 1959-64, compression ratio 7.8:1
AJS Part no. 18506 +.060 AJS - 248cc OHV (Model 14) Year: 1959-64, compression ratio 7.8:1

 

AJS Part no. 10465 +.030 AJS - 347cc OHV (16M) Year: 1948-55, compression ratio 6.3:1. Matchless - 347cc OHV (G3/L) Year: 1948-55, compression ratio 6.3:1.
AJS Part no. 10465 +.040 AJS - 347cc OHV (16M) Year: 1948-55, compression ratio 6.3:1. Matchless - 347cc OHV (G3/L) Year: 1948-55, compression ratio 6.3:1.
AJS Part no. 10465 +.060 AJS - 347cc OHV (16M) Year: 1948-55, compression ratio 6.3:1. Matchless - 347cc OHV (G3/L) Year: 1948-55, compression ratio 6.3:1.
AJS Part no. 18506 +.040 AJS - 248cc OHV (Model 14) Year: 1959-64, compression ratio 7.8:1
AJS Part no. 13268 STD AJS - 592cc OHV (Model 30) Year: 1956-58, compression ratio 7.5:1. Matchless - 592cc OHV (G11)  Year: 1956-58, compression ratio 7.5:1.
AJS Part no. 13268 +.5 MM AJS - 592cc OHV (Model 30) Year: 1956-58, compression ratio 7.5:1. Matchless - 592cc OHV (G11)  Year: 1956-58, compression ratio 7.5:1.
AJS Part no. 13268 +.75 MM AJS - 592cc OHV (Model 30) Year: 1956-58, compression ratio 7.5:1. Matchless - 592cc OHV (G11)  Year: 1956-58, compression ratio 7.5:1.
AJS Part no. 13268 +1 MM AJS - 592cc OHV (Model 30) Year: 1956-58, compression ratio 7.5:1. Matchless - 592cc OHV (G11)  Year: 1956-58, compression ratio 7.5:1.
AJS Part no. 4480 STD AJS - 248cc OHV, Year: 1930-33 (model 33-12, R12, S12, T12) Ring below pin
AJS Part no. 13268 +1.5 MM AJS - 592cc OHV (Model 30) Year: 1956-58, compression ratio 7.5:1. Matchless - 592cc OHV (G11)  Year: 1956-58, compression ratio 7.5:1.
AJS Part no. 4480 +.020 AJS - 248cc OHV, Year: 1930-33 (model 33-12, R12, S12, T12) Ring below pin
AJS Part no. 15762 STD AJS - 646cc OHV (31 Swift) Year 60-62, compression ratio 7.5:1
AJS Part no. 10465 STD AJS - 347cc OHV (16M) Year: 1948-55, compression ratio 6.3:1. Matchless - 347cc OHV (G3/L) Year: 1948-55, compression ratio 6.3:1.
AJS Part no. 10049 STD AJS - 16M, OHV 347cc, Year: 1947
AJS Part no. 15036 STD AJS - 646cc OHV (31CS, 31CSR) Year 1958-60, compression ratio  8.5:1 (bore 72mm)
AJS Part no. 15151 +.060 AJS - 348cc OHV (Model 8) Year 1960-62, compression ratio 7.4:1Matchless - 348cc OHV (G5)
AJS Part no. AMC 1150 FULL GASKET SET AJS 16M/350CC M/L WD G3L 1938-48
AJS Part no. 10524 +.030 AJS - 347cc OHV 16, 16M, 26, 26SS, 26T, Silver Streak. Year: 1935-46. CR 8.5:1
AJS Part no. 15151 STD AJS - 348cc OHV (Model 8) Year 1960-62, compression ratio 7.4:1Matchless - 348cc OHV (G5)
AJS Part no. 15710 STD AJS - 497cc OHV (18CS) Year 1960, compression ratio 8.8:1
AJS Part no. 15710 +.020 AJS - 497cc OHV (18CS) Year 1960, compression ratio 8.8:1
AJS Part no. 11786 +.040 AJS - 498cc OHV (Model 18) Year: 1947-55, compression ratio 7.2:1
Matchless - 498cc OHV (G80) compression ratio 8.5:1 with compression plate removed.
AJS Part no. 11786 +.020 AJS - 498cc OHV (Model 18) Year: 1947-55, compression ratio 7.2:1
Matchless - 498cc OHV (G80) compression ratio 8.5:1 with compression plate removed.
AJS Part no. 9990 +.5 MM AJS - 347cc OHC (16, 16M, 26, 26SS, 26T, Silver Streak) Year: 1935-46, single & 2 port.
AJS Part no. 13379 +.8 MM AJS - 348cc OHV (16MCS) Year 1956-59, compression ratio 9.9:1
AJS Part no. 15151 +.020 AJS - 348cc OHV (Model 8) Year 1960-62, compression ratio 7.4:1
AJS Part no. 19488 STD AJS  - 745cc OHV (Model 33)
Norton  - 745cc OHV (Atlas)
compression ratio 7.5:1, Year: 1965-67.
AJS Part no. 15036 +.020 AJS - 646cc OHV (31CS, 31CSR) Year 1958-60,
compression ratio  8.5:1 (bore 72mm)
AJS Part no. 5041 +.020 AJS - 495cc OHC Year: 1934-36, competition model 34/10, 35/10, 36/10, compression ratio 6:1
AJS Part no. 5380 +.020 AJS - 347cc OHV (35/16, 36/16, 37/16, 38/16, 39/16, 39/16M, 35/26, 36/26, 37/26, 38/26, 39/26, 39/26SS, 39/26T, Silver Streak, Year: 1935-39, single & 2 port - compression ratio 6.1:1
AJS Part no. 4453 +.030 AJS - 246cc OHV (35/12, 36/12, 37/12, 38/12, 39/12, 39/12M, 35/22, 36/22, 37/22, 38/22, 39/22, 39/22S, 39/22T, Silver Streak) Year: 1935-40, single & 2 port - compression ratio 6.85:1
AJS Part no. 7735 +.020 AJS - 250cc OHV (12, 22, 22T) Year: 1937-38, compression ratio 10:1
AJS Part no. 15036 +.030 AJS - 646cc OHV (31CS, 31CSR) Year 1958-60,
compression ratio  8.5:1 (bore 72mm)
AJS Part no. 15036 +.040 AJS - 646cc OHV (31CS, 31CSR) Year 1958-60,
compression ratio  8.5:1 (bore 72mm)
AJS Part no. 10465 +.020 AJS - 347cc OHV (16M) Year: 1948-55, compression ratio 6.3:1. Matchless - 347cc OHV (G3/L) Year: 1948-55, compression ratio 6.3:1.
AJS Part no. AEB 2031 STD AJS/Matchless - 2 pairs of Big End shells for AJS 500 twin, Model 20, 600 twin, 650 twin, 500cc, 600cc & 650cc engines. Matchless 500 twin, 600 twin & 650 twin engines (STD  size)
AJS Part no. AEB 2031 .080 AJS/Matchless - 2 pairs of Big End shells for AJS 500 twin, Model 20, 600 twin, 650 twin, 500cc, 600cc & 650cc engines. Matchless 500 twin, 600 twin & 650 twin engines (.080"  undersize)
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