Top end – Side valve
The only major change to the side valve top end was in 1952 when the head was cast in aluminium instead of iron and the fixings were altered from 7 bolts to 9 studs and nuts.
Tappet settings inlet/exhaust: – VA/VB .003/.006.
Part No. | Description | Per | Model | Years |
PACK-ADV-002 | Valve & guide pack | A | All | All |
PACK-INTER-002 | Top end overhaul pack | A | All | All |
6-36U | Cylinder barrels, – 7 Stud | 1 | All | 1936-52 |
6-52/20 | Cylinder barrels, +20 – 9 Stud | 1 | All | 1952- |
0120 | Tappet cover stud | 1 | VA/VB | 1933-58 |
0183 | Carburetter stud | 2 | VA/VB | 1931-58 |
0204 | Head stud (engine number TC 426 onwards) | 9 | VB | 1952-58 |
0596A | Head bolt (up to engine number TC 225) | 7 | VA/VB | 1933-52 |
73-31 | Head gasket, iron head | 1 | VA/VB | 1931-52 |
73-52 | Head gasket, aluminium head | 1 | VB | 1952-58 |
105-35 | Tappet cover | 1 | VA/VB | 1935-58 |
108-55 | Extension piece for carburetter | 1 | VB | 1955-58 |
109-30 | Gasket, tappet cover | 1 | VA/VB | 1930-58 |
117-34 | Tappet cover dome nut | 1 | VA/VB | 1934-58 |
125-31 | Gasket, cylinder to crankcase | 1 | VA/VB | 1931-58 |
150-52 | Timing plug in cylinder head | 1 | VB | 1952-58 |
162-52 | Head nut (engine no. TC426 onwards) | 9 | VB | 1952-58 |
193-36 | Banjo only for breather pipe | 1 | VA/VB | 1936-58 |
195-36 | Breather pipe banjo bolt | 1 | VA/VB | 1936-58 |
197-36 | Fibre washer, breather pipe | 2 | VA/VB | 1936-58 |
225-33 | Tappet guide | 2 | VA/VB | 1933-58 |
341-38 | Exhaust valve lifter bush | 1 | Sing | 1938-58 |
335-30 | Exhaust valve lifter spindle | 1 | Sing | 1930-58 |
338-30 | Exhaust lifter arm | 1 | Sing | 1930-58 |
344A-38 | Exhaust valve lifter spring washer | 1 | Sing | 1938-58 |
345-38 | Exhaust valve lifter ‘O’ ring seal | 1 | Sing | 1938-58 |
346-38 | Exhaust valve lifter shim, .020 | 1 | Sing | 1938-58 |
346-39 | Exhaust valve lifter shim, .010 | 1 | Sing | 1938-58 |
346-38 | Exhaust valve lifter shim | 1 | Sing | 1938-58 |
348-38 | Exhaust valve lifter fibre washer | 1 | Sing | 1938-58 |
350-29 | Exhaust valve lifter cable stop lug | 1 | A/B/VA/VB | 1929-58 |
400-26 | Inlet valve | 1 | A/B/VA/VB | 1926-35 |
400-36 | Inlet valve | 1 | VA/VB | 1936-51 |
400-52 | Inlet valve | 1 | VB | 1952-58 |
430-36 | Exhaust valve | 1 | VA/VB | 1936-51 |
430-52 | Exhaust valve | 1 | VB | 1952-58 |
460-29 | Valve guide | 2 | A/B/VA/VB | 1929-58 |
515-31 | Valve spring, new free length 2.625” | 2 | VA/VB | 1935-58 |
560-29 | Valve spring bottom collar (nearest the head) | 2 | VB/SB | 1929-58 |
565-29 | Valve spring bottom collar (nearest the head) | 2 | LB/MB | 1929-32 |
580-34 | Halite washer under bottom collar | 2 | Sing | 1934-58 |
590-26 | Valve spring top collar (split cone end) | 2 | A/B/VA/VB | 1926-58 |
620-26 | Split cone (per half) | 4 | A/B/VA/VB | 1926-58 |
1805-28 | Tappet | 2 | A/B/VA/VB | 1928-58 |
1815-26 | Tappet adjuster | 2 | ||
1830-29 | Exhaust tappet lock nut | 1 | A/B/VA/VB | 1929-58 |
S1-2 | Lock nut, exhaust valve lifter cable stop lug | 1 | A/B/VA/VB | 1929-58 |
S2-3 | Inlet tappet lock nut | 1 | A/B/VA/VB | 1929-58 |
S19-3 | Washer, head nut | 9 | VB | 1952-58 |
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