Valves & Guides
For our valve & guide pack please click here.
Pre-unit A Group | |||||
Model | Years | Valve guide | Valve | ||
Inlet | Exhaust | Inlet | Exhaust | ||
A10 (iron head models only) | 1950-59 | 10100-54-SET SAVE OVER 25%! | 10100-54-SET SAVE OVER 25%! | 10100-54-SET SAVE OVER 25%! | 10100-54-SET SAVE OVER 25%! |
A7 | 1947-50 | 67-0031 | 67-0032 | 67-0029 | 67-0030 |
A7ST | 1949-50 | 67-0031 | 67-0032 | 67-0189 | 67-0190 |
A7/ST | 1951-57 | 67-0031 | 67-0031 | 67-0394 | 67-0395 |
A7 | 1958-62 | 67-0031 | 67-0031 | 67-0740 | 67-0741 |
A7SS | 1954-55 | 67-1140 | 67-1140 | 67-0394 | 67-0395 |
A7SS | 1956-57 | 67-1140 | 67-1140 | 67-0351 | 67-0532 |
A7SS | 1958-62 | 67-1110* | 67-1110* | 67-0740 | 67-0741 |
A10/SF | 1950-57 | 67-0031 | 67-0031 | 67-0323 | 67-0324 |
A10 | 1958-62 | 67-0031 | 67-0031 | 67-0742 | 67-0743 |
A10RR | 1954-55 | 67-1140 | 67-1140 | 67-0323 | 67-0324 |
A10RR/SR | 1956-57 | 67-1140 | 67-1140 | 67-0968 | 67-0967 |
A10RR/SR | 1958-59 | 67-1110* | 67-1110* | 67-968 | 67-0967 |
A10RR/SR | 1960-63 | 67-1110* | 67-1110* | 67-1551 | 67-0967 |
A10 RGS / SR | 1960-63 – Oversize inlet | 67-0961 | 67-0967 | ||
BSA actually fitted cast iron guides to the later aluminium alloy heads but we recommend the bronze as detailed above. We can of course supply the cast iron if preferred; they were fitted from engine numbers CA7SS 4024 and CA10R 5602.We also have some oversize versions of 67-1110 valve guide – 0.002 and 0.004 | |||||
Pre-unit B Group | |||||
Model | Years | Valve guide | Valve | ||
Inlet | Exhaust | Inlet | Exhaust | ||
B21/2 | 1937-39 | 65-0207 | |||
B20/23 | 1937-39 | 65-0042 (2) | 65-0042 (lower) | ||
B23 de Luxe | 1939 | 65-0224 | |||
B24/25/26 | 1937-39 | 65-0152 | |||
B29 | 1940 | 65-1111 | 65-1110 | ||
B31/2 | 1946-48 | 65-1145 | 65-1144 | 65-1111 | 65-1110 |
B31 | 1949-60 | 65-1513 | 65-1514 | 65-1111 | 65-1110 |
B32 iron head | 1949-53 | 65-1513 | 65-1514 | 65-1111 | 65-1110 |
B31/2 alloy head | 1950-53 | 65-1511 | 65-1512 | 65-1111 | 65-1110 |
B32 | 1954-57 | 65-1595 | 65-1596 | 65-1759 | 65-1760 |
B33 | 1947-48 | 65-1241 | 65-1242 | 65-1239 | 65-1240 |
B33 | 1949-60 | 65-1515 | 65-1516 | 65-1239 | 65-1240 |
B34 | 1947-48 | 65-1241 | 65-1242 | 65-1239 | 65-1240 |
B34 iron head | 1949-53 | 65-1515 | 65-1516 | 65-1239 | 65-1240 |
B33/4 alloy head | 1950-53 | 65-1517 | 65-1518 | 65-1352 | 65-1353 |
B34 | 1954-57 | 65-1597 | 65-1598 | 65-1752 | 65-1753 |
M Group | |||||
Model | Years | Valve guide | Valve | ||
Inlet | Exhaust | Inlet | Exhaust | ||
M19 | 1937-38 | 66-0144 | 66-0143 | 66-0217 | 66-0215 |
M20/21 | 1937-39 | 66-0137 (2) | 66-0137/8 | 66-0206 | 66-0208 |
M20/21 | 1940-63 | 66-0140 | 66-0139 | 66-0235 | 66-0236 |
M22/23 | 1937-40 | 66-0143 | 66-0142 | 66-0213 | 66-0211 |
M24 | 1938-39 | 66-0193 | 66-0194 | 66-0213 | 66-0211 |
M33 | 1948-57 | 65-1515 | 65-1516 | 65-1239 | 65-1240 |
Pre-unit C Group | |||||
Model | Years | Valve guide | Valve | ||
Inlet | Exhaust | Inlet | Exhaust | ||
C10/10L | 1939-57 | 29-2109 | 29-2110 | 29-2120 | 29-2121 |
C11 | 1939-40 | 65-0037 | 65-0037 | 65-0208 | 65-0208 |
C11/11G/12 | 1946-58 | 65-0037 | 65-0037 | 29-2124 | 65-0208 |
C12 | 1940 | 29-2109 | 29-2110 | 29-2591 | 29-2592 |
| 17 Automatic or mechanical inlet valves “A mechanically-operated inlet valve is to be preferred, because it never sticks, no parts of it can get adrift in the cylinder, and the engine will run more slowly on a hill.” | |||||
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