Pre-Unit B Group
| Pre-unit B Group, M22, 23, 24, 33. The standard models were always fitted with cast iron heads and cylinders; the only change was in 1953 with an increase in fin area. The B32 and B34 used the standard iron head and cylinder until 1954 when aluminium alloy parts were used (optional from 1950). For gaskets see here | ||||
Part No | Description | Per | Models | Years |
| Cylinder head – Used sometimes available, please enquire | ||||
| Cylinder – Used sometimes available, please enquire | ||||
PACK-INTER-002 | Top end overhaul pack | A | All | All |
02-0049 | Carburettor stud, nut | 2 | B/M33 | 1937-60 |
02-0049 | Engine steady nut | 1 | B | 1946-60 |
02-0443 | Exhaust lifter cable stop lock nut | 1 | B/M33 | 1937-60 |
02-0443 | Exhaust lifter spindle nut | 2 | B/M33 | 1937-60 |
02-0525 | Exhaust lifter spindle washer | 2 | B/M33 | 1937-60 |
02-1584 | Exhaust lifter cable toggle screw | 1 | B/M33 | 1937-60 |
02-1588 | Exhaust lifter cable toggle nut | 1 | B/M33 | 1937-60 |
02-1584 | Tappet inspection cover screw | 4 | B/M33 iron head | 1946-60 |
02-1588 | Exhaust lifter bush washer | 1 | B/M33 | 1937-60 |
15-0480 | Engine steady bolt | 1 | B Rig/Plun | 1946-55 |
15-5155 | Carburettor stud plain washer | 2 | B31/2 | 1946-49 |
15-5196 | Carburettor fixing nut | 2 | M24 | 1938-39 |
24-5205 | Carburettor stud, iron head | 2 | B/M33 | 1937-60 |
24-8784 | Carburettor spring washer | 2 | B | 1937-39 |
24-8784 | Engine steady spring washer | 1 | B | 1946-60 |
26-1253 | Rocker box oil return pipe banjo bolt | 2 | B/M19/22/23/24/33 | 1937-60 |
27-1163 | Exhaust lifter cable stop lug | 1 | B/M33 | 1937-60 |
28-2338 | Engine steady bolt | 1 | B S’arm | 1954-60 |
29-0565 | Carburettor stud | 2 | M24 | 1937-39 |
29-0565 | Carburettor stud, alloy head | 2 | B32/34 | 1950-58 |
35-0701 | Exhaust lifter split pin | 1 | B/M33 | 1946-60 |
36-0382 | Carburettor stud, washer, shake proof | 2 | B/M33 | 1946-60 |
42-0050 | Engine steady plate | 1 | B S’arm | 1954-60 |
65-0122 | Cylinder barrel, long rod, sleeved | 1 | B33 long rod | 1946-52 |
65-1137 | Valve lifter | 1 | B/M | 1937-60 |
65-1142 | Cover, valve rocker, iron head | 1 | B29/31/32/33/34/M33 | 1940-60 |
65-1153 | Engine steady stay | 1 | B Rig/Plun | 1946-55 |
65-1156 | Cylinder head, cast iron, various conditions | 1 | B31/2 | |
65-1165 | Valve lifter spindle | |||
65-1215 | Oil return pipe | 1 | B/M33 rigid/plunger | 1946-55 |
65-1218 | Oil return pipe | 1 | B/M33 S’arm | 1954-60 |
65-1413 | Cylinder head bolt | 4 | B34 | 1949-57 |
65-1703 | Cylinder, square fin, new | 1 | B31 | |
65-1703U | Cylinder, square fin, used, various bores | 1 | B31 | |
65-1822 | Head bolt | B34? | ||
66-0115 | Cylinder head through bolt | 4 | M22/23/24 | 1937-40 |
66-0115 | Cylinder head through bolt, iron head | 4 | B31/32/33/34/M33 | 1946-58 |
66-0115Q | Cylinder head through bolt – Stainless | 4 | As Above | As Above |
66-1431 | Exhaust lifter lever | 1 | B/M33 | 1937-54 |
66-1435 | Exhaust lifter spindle | 1 | B23 | 1937-39 |
66-1436 | Exhaust lifter lever | 1 | B/M33 | 1955-60 |
EB102 | Exhaust lifter lever nut | 1 | B/M33 | 1937-50 |
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