Motorcycle Engine Codes: Ariel 1926-1959
| Engine | Rigid | Plunger | Yr/Model | DisplacementDisplacement The volume through which the piston travels during a single stroke of an engine. This term is sometimes also used for the total volume displaced by all engine pistons. The displacement is measured inn cubic centimeteres (ccm). |
| ****** | ******* | S/A* | *********** | ********* |
| A | J | – | 1931 MF | 350cc OHVOHV Overhead valve. |
| AB | F | – | 1936 LG,LH | 250cc OHV |
| AC | XF | – | 1937 LG,LH | 250cc OHV |
| AD | XG | – | 1938 LG,LH | 250cc OHV |
| AE | M | – | 1939 OG,OH | 250cc OHV |
| AH | M | – | 1940 OG,OH | 250cc OHV |
| AJ | BP | BX | 1948 NG,NH | 350cc OHV |
| ALA | – | MT* | 1956 LH | 200cc OHV |
| AMA | – | APR* | 1957 NH | 350cc OHV |
| AMA | – | RT* | 1957 HT3 | 350cc OHV |
| AMB | – | APR* | 1957 VH | 500cc OHV |
| AMC | – | APR* | 1957 VB | 600cc SV |
| AMD | – | APR* | 1957 KH(2) | 500cc OHV |
| B | B | – | 1932 MB32 | 350cc SV |
| B | B | – | 1932 MF32 | 350cc OHV |
| BA | E | – | 1933 NF,NH | 350cc OHV |
| BA | Y | – | 1933 NF,NH | 350cc OHV |
| BB | F | – | 1936 NG,NH | 350cc OHV |
| BC | XF | – | 1937 NG,NH | 350cc OHV |
| BD | XG | – | 1938 NG,NH | 350cc OHV |
| BE | XG | BX | 1939 NG,NH | 350cc OHV |
| BH | XG | – | 1940-5W/NG | 350cc OHV |
| BH | XG | BX | 1940 NG,NH | 350cc OHV |
| BJ | BP | BX | 1948 VB | 600cc SV |
| BJ | BP | BX | 1948 VG,VH | 500cc OHV |
| BK | AP/BP | – | 1946 NG,NH | 350cc OHV |
| BK | AP/BP | – | 1947 NG,NH | 350cc OHV |
| BLA | – | ST* | 1957 LH | 200cc OHV |
| C | C | – | 1932 VB32 | 557cc SV |
| C | C | – | 1932 VG32 | 500cc OHV |
| C | C | – | 1932 VH32 | 500cc OHV |
| C | D | – | 1932 VB32 | 557cc SV |
| C | D | – | 1932 VG32 | 500cc OHV |
| C | D | – | 1932 VH32 | 500cc OHV |
| CA | Y | – | 1933 VA,VB | 600cc SV |
| CA | Y | – | 1933 VF,VH | 500cc OHV |
| CAMA | – | CAPR* | 1958 NH | 350cc OHV |
| CAMA | – | CAPR* | 1959 NH | 350cc OHV |
| CAMB | – | CAPR* | 1958 VH | 500cc OHV |
| CAMB | – | CAPR* | 1959 VH | 500cc OHV |
| CAMC | – | CAPR* | 1958 VB | 600cc SV |
| CAMC | – | CAPR* | 1959 VB | 600cc SV |
| CB | F | – | 1936 VB | 600cc SV |
| CB | F | – | 1936 VG,VH | 500cc OHV |
| CBLA | – | CST* | 1958 LH | 200cc OHV |
| CBLA | – | CST* | 1959 LH | 200cc OHV |
| CC | XF | – | 1937 VB | 600cc SV |
| CC | XF | – | 1937 VG,VH | 500cc OHV |
| CD | XG | – | 1938 VB | 600cc SV |
| CD | XG | – | 1938 VG,VH | 500cc OHV |
| CE | XG | BX | 1939 VA | 500cc SV |
| CE | XG | BX | 1939 VA | 600cc SV |
| CE | XG | BX | 1939 VG, VH | 500cc OHV |
| CH | XG | BX | 1940 VA,VB | 600cc SV |
| CH | XG | BX | 1940 VG,VH | 500cc OHV |
| CJ | XP | AX | 1948 4G SQ4 | 1000ccOHV |
| CK | BP | – | 1946 VB | 500cc SV |
| CK | BP | – | 1946 VG,VH | 500cc OHV |
| CK | BP | – | 1947 VB | 600cc SV |
| CK | BP | – | 1947 VG,VH | 500cc OHV |
| CNH | – | CPRS* | 1958 HS | 500cc OHV |
| CNH | – | CPRS* | 1959 HS | 500cc OHV |
| CNJ | – | CRT* | 1958 HT5 | 500cc OHV |
| CNJ | – | CRT* | 1959 HT5 | 500cc OHV |
| CNLF | – | CAPR* | 1958 FH(2) | 650cc OHV |
| CNLF | – | CAPR* | 1959 FH(2) | 650cc OHV |
| CNML | – | CGM | 1958 SQ4MKII | 1000ccOHV |
| CNML | – | CGM | 1959 SQ4MKII | 1000ccOHV |
| CO | AB/COM | SF | 1950 VCH | 500cc OHV |
| CO | COM | SF | 1949 VCH | 500cc OHV |
| CO | WA/COM | SA | 1951 VCH | 500cc OHV |
| D | D | – | 1932 SB32 | 557cc SV |
| D | D | – | 1932 VG32 | 500cc OHV |
| DA | Y | – | 1933 LH | 250cc OHV |
| DB | P | – | 1936 4G SQ4 | 1000ccOHV |
| DC | P | – | 1937 4G SQ4 | 1000ccOHV |
| DC | P | – | 1938 4G SQ4 | 1000ccOHV |
| DD | P | – | 1938 4G SQ4 | 1000ccOHV |
| DE | P | AX | 1940 4G,4H SQ4 | 1000ccOHV |
| DH | P | AX | 1939 4G,4H SQ4 | 1000ccOHV |
| DH | XP | AX | 1946 4G SQ4 | 1000ccOHV |
| DH | XP | AX | 1947 4G SQ4 | 1000ccOHV |
| DJ | RF | SF | 1949 NG,NH | 350cc OHV |
| DK | XP | AX | 1946 4G SQ4 | 1000ccOHV |
| DK | XP | AX | 1947 4G SQ4 | 1000ccOHV |
| E | B | – | 1932 LB32 | 250cc OHV |
| E | B | – | 1932 LF32 | 250cc OHV |
| E | D | – | 1932 LB32 | 250cc SV |
| E | D | – | 1932 LF32 | 250cc OHV |
| EA | Y | – | 1934 LF,LH | 250cc OHV |
| EC | P | – | 1937 4F SQ4 | 600cc OHV |
| EE | P | AX | 1939 4F SQ4 | 600cc OHV |
| EEH | P | AX | 1940 4F SQ4 | 600cc OHV |
| EH | P | AX | 1940 4F SQ4 | 600cc OHV |
| EJ | RF | SF | 1949 VB | 600cc SV |
| EJ | RF | SF | 1949 VG,VH | 500cc OHV |
| FA | Y | – | 1934 NF,NH | 350cc OHV |
| FJ | GR | GS | 1949 MKI SQ4 | 1000cc OHV |
| GA | Y | – | 1934 VA,VB | 600cc SV |
| GA | Y | – | 1934 VF,VH | 500cc OHV |
| GL | – | PS | 1955 MKII SQ4 | 1000cc OHV |
| H | H | – | 1929 Mod A, B | 557cc SV |
| H | H | – | 1929 Mod E, F | 500cc OHV |
| HA | Y | – | 1935 L, F | 250cc OHV |
| HT | HH | HS | 1949 KG, KH(2) | 500cc OHV |
| J | J | – | 1931 L1, L2 | 250cc OHV |
| J | J | – | 1931 LB | 250cc SV |
| JA | Y | – | 1935 NF, NH | 350cc OHV |
| JJ | TD | CW | 1950 MKI SQ4 | 1000cc OHV |
| K | K | – | 1939 Mod A, B | 557cc SV |
| K | K | – | 1930 Mod E,F,G | 500cc OHV |
| KA | Y | – | 1935 VA, VB | 600cc SV |
| KA | Y | – | 1935 VF,VG,VH | 500cc OHV |
| KL | AB | AC | 1950 NG, NH | 350cc OHV |
| L | L | – | 1929 LB | 250cc OHV |
| L | L | – | 1929 LB | 250cc SV |
| LB | – | DU* | 1955 NH | 350cc OHV |
| LC | – | DU* | 1955 VH | 500cc OHV |
| LD | RF | DU* | 1955 VB | 600cc SV |
| LE | – | DU* | 1955 KH(2) | 500cc OHV |
| LF | – | DU* | 1955 FH(2) | 650cc OHV |
| LH | – | LS* | 1955 LH | 200cc OHV |
| LJ | TF | – | 1955 HT | 500cc OHV |
| LK | – | KSS* | 1955 HS | 500cc OHV |
| LK | – | DUS* | 1955 HS | 500cc OHV |
| M | L | – | 1930 LB | 250cc SV |
| M | L | – | 1930 LF, LG | 250cc OHV |
| MA | – | PR* | 1956 NH | 350cc OHV |
| MB | – | PR* | 1956 VH | 500cc OHV |
| MC | – | PR* | 1956 VB | 600cc SV |
| MD | – | PR* | 1956 KH(2) | 500cc OHV |
| MH | – | PRS* | 1956 HS | 500cc OHV |
| MJ | – | RT* | 1956 HT | 500cc OHV |
| ML | – | GM | 1956 SQ4 MKII | 1000cc OHV |
| MLF | – | PR* | 1956 FH(2) | 650cc OHV |
| MN | AB | AC | 1950 VB | 600cc SV |
| MN | AB | AC | 1950 VG, VH | 500cc OHV |
| N | K | – | 1931 VB | 557cc SV |
| N | K | – | 1931 VF, VG | 500cc OHV |
| N | N | – | 1931 VB | 557cc SV |
| N | N | – | 1931 VF, VG | 500cc OHV |
| NBH | XG | – | 1940-45 W/NG | 350cc (RN) |
| NH | – | PRS* | 1957 HS | 500cc OHV |
| NJ | – | RT* | 1957 HT5 | 500cc OHV |
| NML | – | GM | 1957 SQ4MKII | 1000cc OHV |
| OP | GD | LL | 1950 KG, KH(2) | 500cc OHV |
| P | P | – | 1926 A, B | 557cc SV |
| P | P | – | 1926 C, D | 500cc OHV |
| PA | – | KN* | 1954 LH | 200cc OHV |
| PB | KW | KS* | 1954 NH | 350cc OHV |
| PD | – | KS* | 1954 VH | 500cc OHV |
| PD | KT/TF | – | 1954 HT | 500cc OHV |
| PE | KW | VS | 1954 VB | 600cc SV |
| PH | BW | KS* | 1954 KH (2) | 500cc OHV |
| PJ | – | KS* | 1954 FH (2) | 650cc OHV |
| PL | – | KR | 1954 SQ4 MKII | 1000cc OHV |
| PS | – | KSS* | 1954 HS | 500cc OHV |
| PT | DX | CX | 1948 KG,KH(2) | 500cc OHV |
| PT | KT/TF | – | 1954 KT | 500cc OHV |
| R | R | – | 1931 4F SQ4 | 500cc OHCOHC Overhead camshaft. |
| R | T | – | 1932 4F SQ4 | 500cc OHC |
| RA | WA | SA | 1951 NH | 350cc OHV |
| RB | WA | SA | 1951 VB | 600cc VB |
| RB | WA | SA | 1951 VH | 500cc OHV |
| RBH | XG | – | 1940-45 W/NG | 350cc (RAF) |
| RC | WB | SB | 1951 KG,KH(2) | 500cc OHV |
| RD | WC | SC | 1951 SQ4MKI | 1000cc OHV |
| S | S | – | 1931 SB | 557cc SV |
| S | S | – | 1931 SF, SG | 500cc OHV |
| T | T | – | 1932 4F SQ4 | 600cc OHC |
| TA | Y | – | 1933 4F SQ4 | 600cc OHC |
| TB | OA | SD | 1952 NH | 350cc OHV |
| TC | OA | SD | 1952 VB | 600cc SV |
| TC | OA | SD | 1952 VH | 500cc OHV |
| TCA | OA | SD | 1952 VHA | 500cc OHV |
| TE | OB | SE | 1952 KG, KH(2) | 500cc OHV |
| TH | – | CRT* | 1958 HT3 | 350cc OHV |
| TH | – | CRT* | 1959 HT3 | 350cc OHV |
| TM | OC | SV | 1952 SQ4MKI | 1000cc OHV |
| TR | OR | – | 1952 VCH | 500cc OHV |
| UA | Y | – | 1934 4F SQ4 | 600cc OHC |
| V | V | – | 1927 A, B | 557cc SV |
| V | V | – | 1927 C, D, E | 500cc OHV |
| VB | AM | AS | 1953 VB | 600cc SV |
| W | W | – | 1928 A, B | 557cc SV |
| W | W | – | 1928 C, D, E | 500cc OHV |
| WA | Y | – | 1935 4F SQ4 | 600cc OHC |
| XA | AM | AS | 1953 NH | 350cc OHV |
| XB | Y | – | 1936 F4 SQ4 | 600cc OHC |
| XC | AM | AS | 1953 VH | 500cc OHV |
| XD | AM | AS | 1953 VHA | 500cc OHV |
| XE | MA | – | 1953 VCH | 500cc OGV |
| XF | BW | BS | 1953 KH(2) | 500cc OHV |
| XFA | BW | BS | 1953 KHA(2) | 500cc OHV |
| XH | – | ES | 1953 SQ4 MKI | 1000cc OHV |
