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Norton Parts

Motorcycle Pistons
Make Part No. Description
Norton  Part no. 10226 +.040 Norton - 490cc OHV (18, ES2, 500T) Year: 1948-55.
Norton  Part no. 13329 +.060 Norton - 348cc OHV (Model 50) Year: 1956-58
Norton  Part no. 13325 +.060 Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 18554 +.030 Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year 1964-69, high compression 10.05:1
745cc OHV (Commando) Year: 1968-73, high compression 10.25:1
745cc OHV (Combat 750 Engine) Year: 1973 on, high compression 10.25:1
Norton  Part no. 18548 +.060 Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948-63, high compression 9.2/9.5:1 - (88SS, Dominator Twin) Year: 1964-66, compression ratio 9.5:1
Norton  Part no. NOR 2252D HEAD SET NORTON 16H 1948-54
Norton  Part no. NOR 2255 FULL GASKET SET NORTON 77/88/99 TWINS 1957 ON
Norton  Part no. NOR 2255D HEAD SET NORTON DOMINATOR 500, 77/88/99 1957-58
Norton  Part no. NOR 2256D HEAD SET NORTON ES2 1957-66
Norton  Part no. NOR 2257 FULL GASKET  SET NORTON MODEL 50 1957-66
Norton  Part no. NOR 2258 FULL GASKET SET NORTON ES2 57-66/195 1957-58
Norton  Part no. NOR 2260 FULL GASKET SET NORTON TWIN JUBILEE 1959-66
Norton  Part no. AEB 2025 STD Norton - 2 pairs of Big End shells for Jubilee twin, Twin 77, Dominator, 88 twin, 99 twin 1953 250cc, 500cc & 600cc engines.  (STD size)
Norton  Part no. NOR 2261D HEAD SET NORTON DOMINATOR 1963-70
Norton  Part no. NOR 2262R ROCKER COVER SET NORTON MANXMAN/DOMINATOR 1961-70
Norton  Part no. NOR 2263 FULL GASKET SET NORTON NAVIGATOR 1961-65
Norton  Part no. NOR 2265 FULL GASKET SET NORTON ATLAS 750 (P11A) 1967-68
Norton  Part no. NOR 2265D HEAD SET NORTON ATLAS 750 (P11A) 1967-68
Norton  Part no. 15418 STD Norton - 349cc OHV (Navigator) Year 1961-62, compression ratio 8.25:1
Norton  Part no. 15418 +.020 Norton - 349cc OHV (Navigator) Year 1961-62, compression ratio 8.25:1
Norton  Part no. 15418 +.030 Norton - 349cc OHV (Navigator) Year 1961-62, compression ratio 8.25:1
Norton  Part no. 15418 +.040 Norton - 349cc OHV (Navigator) Year 1961-62, compression ratio 8.25:1
Norton  Part no. 15418 +.060 Norton - 349cc OHV (Navigator) Year 1961-62, compression ratio 8.25:1
Norton  Part no. AEB 2025 .005 Norton - 2 pairs of Big End shells for Jubilee twin, Twin 77, Dominator, 88 twin, 99 twin 1953 250cc, 500cc & 600cc engines.  (.005" undersize)
Norton  Part no. 16104 STD Norton - 397cc (Electra 400) 2 port, Year: 1963-64, compression ratio 7.9:1
Norton  Part no. 16104 +.010 Norton - 397cc (Electra 400) 2 port, Year: 1963-64, compression ratio 7.9:1
Norton  Part no. 16104 +.020 Norton - 397cc (Electra 400) 2 port, Year: 1963-64, compression ratio 7.9:1
Norton  Part no. AEB 2025 .020 Norton - 2 pairs of Big End shells for Jubilee twin, Twin 77, Dominator, 88 twin, 99 twin 1953 250cc, 500cc & 600cc engines.  (.020" undersize)
Norton  Part no. NOR 2266 FULL GASKET SET NORTON COMMANDO 750 FASTBACK 1968 ON
Norton  Part no. AEB 2025 .030 Norton - 2 pairs of Big End shells for Jubilee twin, Twin 77, Dominator, 88 twin, 99 twin 1953 250cc, 500cc & 600cc engines.  (.030" undersize)
Norton  Part no. NOR 2266D HEAD SET NORTON COMMANDO 750 FASTBACK 1968 ON
Norton  Part no. 15304 STD Norton - 249cc OHV (Jubilee 250) Year: 1959-66, compression ratio 8.75:1
Norton  Part no. NOR 2268 FULL GASKET SET NORTON ATLAS 750 1967-68
Norton  Part no. NOR 2268D HEAD SET NORTON ATLAS 750 1967-68
Norton  Part no. NOR 2269 FULL GASKET SET NORTON COMMANDO 750 F/B COPPER H/GASKET 1968 ON
Norton  Part no. NOR 2270 FULL GASKET SET NORTON COMMANDO 850 1973 ON
Norton  Part no. NOR 2271 FULL GASKET SET NORTON COMMANDO ELECTRIC START 1973 ON
Norton  Part no. NOR 2271D HEAD SET NORTON COMMANDO ELECTRIC START 1973 ON
Norton  Part no. AEB 2025 .040 Norton - 2 pairs of Big End shells for Jubilee twin, Twin 77, Dominator, 88 twin, 99 twin 1953 250cc, 500cc & 600cc engines.  (.040" undersize)
Norton  Part no. AEB 2101 STD Norton - 2 pairs of Big End shells for SS650 Manxman, Atlas 750, Twin 750 Commando 1968 on, 850 Commando. To engine no. 116371 OHV twin 647cc, 745cc & 830cc engines.  (STD size)
Norton  Part no. AEB 2101 .010 Norton - 2 pairs of Big End shells for SS650 Manxman, Atlas 750, Twin 750 Commando 1968 on, 850 Commando. To engine no. 116371 OHV twin 647cc, 745cc & 830cc engines.  (.010" undersize)
Norton  Part no. AEB 2101 .020 Norton - 2 pairs of Big End shells for SS650 Manxman, Atlas 750, Twin 750 Commando 1968 on, 850 Commando. To engine no. 116371 OHV twin 647cc, 745cc & 830cc engines.  (.020" undersize)
Norton  Part no. AEB 2101 .030 Norton - 2 pairs of Big End shells for SS650 Manxman, Atlas 750, Twin 750 Commando 1968 on, 850 Commando. To engine no. 116371 OHV twin 647cc, 745cc & 830cc engines.  (.030" undersize)
Norton  Part no. AEB 2101 .040 Norton - 2 pairs of Big End shells for SS650 Manxman, Atlas 750, Twin 750 Commando 1968 on, 850 Commando. To engine no. 116371 OHV twin 647cc, 745cc & 830cc engines.  (.040" undersize)
Norton  Part no. 16104 +.040 Norton - 397cc (Electra 400) 2 port, Year: 1963-64, compression ratio 7.9:1
Norton  Part no. 10338 +.060 Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948 on, high compression 7.8:1
Norton  Part no. 18554 +.020 Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year 1964-69, high compression 10.05:1
745cc OHV (Commando) Year: 1968-73, high compression 10.25:1
745cc OHV (Combat 750 Engine) Year: 1973 on, high compression 10.25:1
Norton  Part no. 18553 +.020 Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 9/10.2:1,
597cc OHV (Nomad Twin) Year: 1958-60, compression ratio 9:1
Norton  Part no. 13334 STD Norton - 596cc OHV (19R, 19S) Year: 1955-58, compression ratio 6.4:1.
Norton  Part no. 16104 +.030 Norton - 397cc (Electra 400) 2 port, Year: 1963-64, compression ratio 7.9:1
Norton  Part no. 13334 +.020 Norton - 596cc OHV (19R, 19S) Year: 1955-58, compression ratio 6.4:1.
Norton  Part no. 10226 +.030 Norton - 490cc OHV (18, ES2, 500T) Year: 1948-55.
Norton  Part no. 10226 +.060 Norton - 490cc OHV (18, ES2, 500T) Year: 1948-55.
Norton  Part no. 10226 +.020 Norton - 490cc OHV (18, ES2, 500T) Year: 1948-55.
Norton  Part no. 13334 +.040 Norton - 596cc OHV (19R, 19S) Year: 1955-58, compression ratio 6.4:1.
Norton  Part no. 13334 +.060 Norton - 596cc OHV (19R, 19S) Year: 1955-58, compression ratio 6.4:1.
Norton  Part no. 3478 +.030 Norton - 490cc OHV (CS1, ES2, 18) Year: 1929-30, high compression 7.6:1
Norton  Part no. 18548 +.020 Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948-63, high compression 9.2/9.5:1 - (88SS, Dominator Twin) Year: 1964-66, compression ratio 9.5:1
Norton  Part no. 10226 STD Norton - 490cc OHV (18, ES2, 500T) Year: 1948-55.
Norton  Part no. 17839 +.020 Norton - 650cc OHV (Manxman, 650, 650SS, Dominator Twin, Mercury) Year: 1961-70, compression ratio 8.9:1
Norton  Part no. 19342 +.040 Norton - 828cc OHV (Commando 850) Year: 1973 on, compression ratio 8.5:1
Norton  Part no. 10533 STD Left Hand Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948-58, compression ratio 6.75:1
Norton  Part no. 18549 STD Left Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 8/8.95:1
Norton  Part no. 18549 +.020 Right Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 8/8.95:1
Norton  Part no. 18549 +1 MM Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 8/8.95:1
Norton  Part no. 18548 STD Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948-63, high compression 9.2/9.5:1 - (88SS, Dominator Twin) Year: 1964-66, compression ratio 9.5:1
Norton  Part no. 18548 +.030 Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948-63, high compression 9.2/9.5:1 - (88SS, Dominator Twin) Year: 1964-66, compression ratio 9.5:1
Norton  Part no. 18548 +.040 Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948-63, high compression 9.2/9.5:1 - (88SS, Dominator Twin) Year: 1964-66, compression ratio 9.5:1
Norton  Part no. 18548 +.040 Right Hand Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948-63, high compression 9.2/9.5:1 - (88SS, Dominator Twin) Year: 1964-66, compression ratio 9.5:1
Norton  Part no. 18553 STD Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 9/10.2:1,
597cc OHV (Nomad Twin) Year: 1958-60, compression ratio 9:1
Norton  Part no. 18553 +.030 Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 9/10.2:1,
597cc OHV (Nomad Twin) Year: 1958-60, compression ratio 9:1
Norton  Part no. 18553 +.030 Left Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 9/10.2:1,
597cc OHV (Nomad Twin) Year: 1958-60, compression ratio 9:1
Norton  Part no. 18553 +.040 Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 9/10.2:1,
597cc OHV (Nomad Twin) Year: 1958-60, compression ratio 9:1
Norton  Part no. 18553 +.060 Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 9/10.2:1,
597cc OHV (Nomad Twin) Year: 1958-60, compression ratio 9:1
Norton  Part no. 18553 +.060 Left Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-62, high compression 9/10.2:1,
597cc OHV (Nomad Twin) Year: 1958-60, compression ratio 9:1
Norton  Part no. 18554 STD Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year 1964-69, high compression 10.05:1
745cc OHV (Commando) Year: 1968-73, high compression 10.25:1
745cc OHV (Combat 750 Engine) Year: 1973 on, high compression 10.25:1
Norton  Part no. 18554 +.6 MM Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year 1964-69, high compression 10.05:1
745cc OHV (Commando) Year: 1968-73, high compression 10.25:1
745cc OHV (Combat 750 Engine) Year: 1973 on, high compression 10.25:1
Norton  Part no. 18554 STD Left Hand Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year 1964-69, high compression 10.05:1
745cc OHV (Commando) Year: 1968-73, high compression 10.25:1
745cc OHV (Combat 750 Engine) Year: 1973 on, high compression 10.25:1
Norton  Part no. 18554 +.040 Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year 1964-69, high compression 10.05:1
745cc OHV (Commando) Year: 1968-73, high compression 10.25:1
745cc OHV (Combat 750 Engine) Year: 1973 on, high compression 10.25:1
Norton  Part no. 18554 +.040 Left Hand Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year 1964-69, high compression 10.05:1
745cc OHV (Commando) Year: 1968-73, high compression 10.25:1
745cc OHV (Combat 750 Engine) Year: 1973 on, high compression 10.25:1
Norton  Part no. 18554 +.060 Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year 1964-69, high compression 10.05:1
745cc OHV (Commando) Year: 1968-73, high compression 10.25:1
745cc OHV (Combat 750 Engine) Year: 1973 on, high compression 10.25:1
Norton  Part no. 17839 STD Norton - 650cc OHV (Manxman, 650, 650SS, Dominator Twin, Mercury) Year: 1961-70, compression ratio 8.9:1
Norton  Part no. 17839 +.8 MM Norton - 650cc OHV (Manxman, 650, 650SS, Dominator Twin, Mercury) Year: 1961-70, compression ratio 8.9:1
Norton  Part no. 17839 +.040 Norton - 650cc OHV (Manxman, 650, 650SS, Dominator Twin, Mercury) Year: 1961-70, compression ratio 8.9:1
Norton  Part no. 17839 +.060 Norton - 650cc OHV (Manxman, 650, 650SS, Dominator Twin, Mercury) Year: 1961-70, compression ratio 8.9:1
Norton  Part no. 19145 STD Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year: 1964-69, high compression 8.7:1,  
 (Commando) Year: 1968-72,  compression ratio 8.9:1, (Combat 750 Engine)
 Year: 1973 on, compression ratio 10.25:1, (Combat 750 Engine) Year: 1973 on,
 compression ratio 9:1,
Norton  Part no. 19145 +.020 Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year: 1964-69, high compression 8.7:1,  
 (Commando) Year: 1968-72,  compression ratio 8.9:1, (Combat 750 Engine)
 Year: 1973 on, compression ratio 10.25:1, (Combat 750 Engine) Year: 1973 on,
 compression ratio 9:1,
Norton  Part no. 19145 +.020 Right Hand Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year: 1964-69, high compression 8.7:1,  
 (Commando) Year: 1968-72,  compression ratio 8.9:1, (Combat 750 Engine)
 Year: 1973 on, compression ratio 10.25:1, (Combat 750 Engine) Year: 1973 on,
 compression ratio 9:1,
Norton  Part no. 19145 +.030 Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year: 1964-69, high compression 8.7:1,  
 (Commando) Year: 1968-72,  compression ratio 8.9:1, (Combat 750 Engine)
 Year: 1973 on, compression ratio 10.25:1, (Combat 750 Engine) Year: 1973 on,
 compression ratio 9:1,
Norton  Part no. 19145 +.040 Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year: 1964-69, high compression 8.7:1,  
 (Commando) Year: 1968-72,  compression ratio 8.9:1, (Combat 750 Engine)
 Year: 1973 on, compression ratio 10.25:1, (Combat 750 Engine) Year: 1973 on,
 compression ratio 9:1,
Norton  Part no. 19145 +.060 Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year: 1964-69, high compression 8.7:1,  
 (Commando) Year: 1968-72,  compression ratio 8.9:1, (Combat 750 Engine)
 Year: 1973 on, compression ratio 10.25:1, (Combat 750 Engine) Year: 1973 on,
 compression ratio 9:1,
Norton  Part no. 19145 +.060 Right Hand Norton - 745cc OHV (Atlas P11, P11A, N15CS) Year: 1964-69, high compression 8.7:1,  
 (Commando) Year: 1968-72,  compression ratio 8.9:1, (Combat 750 Engine)
 Year: 1973 on, compression ratio 10.25:1, (Combat 750 Engine) Year: 1973 on,
 compression ratio 9:1,
Norton  Part no. 19342 STD Norton - 828cc OHV (Commando 850) Year: 1973 on, compression ratio 8.5:1
Norton  Part no. 19342 +.020 Norton - 828cc OHV (Commando 850) Year: 1973 on, compression ratio 8.5:1
Norton  Part no. 19342 +.060 Norton - 828cc OHV (Commando 850) Year: 1973 on, compression ratio 8.5:1
Norton  Part no. 3478 STD Norton - 490cc OHV (CS1, ES2, 18) Year: 1929-30, high compression 7.6:1
Norton  Part no. 3478 +.020 Norton - 490cc OHV (CS1, ES2, 18) Year: 1929-30, high compression 7.6:1
Norton  Part no. 3594 +.040 Norton - 348cc OHC (CJ, JE) Year: 1931-33, (40, International) Year: 1932-33,
 OHV (Model 50) Year: 1933-34, compression ratio 7.25:1
Norton  Part no. 8617 STD Norton - 490cc Side Valve (16H, WD) Year: 1931-47
Norton  Part no. 8617 +.020 Norton - 490cc Side Valve (16H, WD) Year: 1931-47
Norton  Part no. 8617 +.030 Norton - 490cc Side Valve (16H, WD) Year: 1931-47
Norton  Part no. 8617 +.040 Norton - 490cc Side Valve (16H, WD) Year: 1931-47
Norton  Part no. 8617 +.060 Norton - 490cc Side Valve (16H, WD) Year: 1931-47
Norton  Part no. NOR 2250D HEAD SET NORTON 16H 1938-47
Norton  Part no. 5172 STD Norton - 490cc OHC (International, Model 30) Year: 1934-52
Norton  Part no. 5172 +.020 Norton - 490cc OHC (International, Model 30) Year: 1934-52
Norton  Part no. 5172 +.030 Norton - 490cc OHC (International, Model 30) Year: 1934-52
Norton  Part no. 5172 +.040 Norton - 490cc OHC (International, Model 30) Year: 1934-52
Norton  Part no. 5172 +.060 Norton - 490cc OHC (International, Model 30) Year: 1934-52
Norton  Part no. 5172 +.080 Norton - 490cc OHC (International, Model 30) Year: 1934-52
Norton  Part no. 10297 STD Norton - 490cc SV (16 H) Year: 1948-54.
Norton  Part no. 10913 +.040 Norton - 499cc OHC (30, Manx) Year: 1939-53, compression ratio 7.22:1
Norton  Part no. 10913 +.080 Norton - 499cc OHC (30, Manx) Year: 1939-53, compression ratio 7.22:1
Norton  Part no. 10890 STD Norton - 596cc Side Valve (Big 4 No.1) Year: 1947-54
Norton  Part no. 10890 +.020 Norton - 596cc Side Valve (Big 4 No.1) Year: 1947-54
Norton  Part no. 10890 +.030 Norton - 596cc Side Valve (Big 4 No.1) Year: 1947-54
Norton  Part no. 10890 +.040 Norton - 596cc Side Valve (Big 4 No.1) Year: 1947-54
Norton  Part no. 10890 +.060 Norton - 596cc Side Valve (Big 4 No.1) Year: 1947-54
Norton  Part no. 10890 +1 MM Norton - 596cc Side Valve (Big 4 No.1) Year: 1947-54
Norton  Part no. 13346 STD Norton - 490cc OHV (ES2) Year: 1956-58, compression ratio 7.1:1
Norton  Part no. 13346 +.020 Norton - 490cc OHV (ES2) Year: 1956-58, compression ratio 7.1:1
Norton  Part no. 13346 +.030 Norton - 490cc OHV (ES2) Year: 1956-58, compression ratio 7.1:1
Norton  Part no. 13346 +.040 Norton - 490cc OHV (ES2) Year: 1956-58, compression ratio 7.1:1
Norton  Part no. 13346 +.060 Norton - 490cc OHV (ES2) Year: 1956-58, compression ratio 7.1:1
Norton  Part no. 13346 +1 MM Norton - 490cc OHV (ES2) Year: 1956-58, compression ratio 7.1:1
Norton  Part no. 13329 STD Norton - 348cc OHV (Model 50) Year: 1956-58
Norton  Part no. 13329 +.8 MM Norton - 348cc OHV (Model 50) Year: 1956-58
Norton  Part no. 13329 +.020 Norton - 348cc OHV (Model 50) Year: 1956-58
Norton  Part no. 13329 +.030 Norton - 348cc OHV (Model 50) Year: 1956-58
Norton  Part no. 13329 +.040 Norton - 348cc OHV (Model 50) Year: 1956-58
Norton  Part no. 10338 STD Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948 on, high compression 7.8:1
Norton  Part no. 10338 +.75 MM Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948 on, high compression 7.8:1
Norton  Part no. 10338 +.020 Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948 on, high compression 7.8:1
Norton  Part no. 10338 +.030 Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948 on, high compression 7.8:1
Norton  Part no. 10338 +.030 Left Hand Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948 on, high compression 7.8:1
Norton  Part no. 10338 +.040 Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948 on, high compression 7.8:1
Norton  Part no. 10338 +.040 Left Hand Norton - 500cc OHV (7, 88, Dominator Twin) Year: 1948 on, high compression 7.8:1
Norton  Part no. 13325 +.6 MM Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 +.6 MM Right Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 +.8 MM Right Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 STD Right Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 +.020 Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 +.020 Right Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 +.030 Right Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 +.040 Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 +.060 Right Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 STD Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 +1.6 MM Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 13325 +1.6 MM Right Hand Norton - 597cc OHV (77, 99, Dominator Twin) Year: 1956-58, compression ratio 7.4:1
Norton  Part no. 16104 +.060 Norton - 397cc (Electra 400) 2 port, Year: 1963-64, compression ratio 7.9:1
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