Pre-Unit A Group

For gaskets click here; for head steadies, rocker box drain pipes and exhaust lifter click here; for push rods click here; for push rod covers click here.

Pre-unit A Group. The long stroke A7 had 2 separate rocker boxes with circular inspection caps that unscrewed. All the later models used a large 1-piece rocker box with 2 large inspection covers. Although there are 7 different rocker boxes listed in the parts books, after inspecting our large collection of used ones, no differences could be found. Initially no rocker oil feed was fitted and the first supply was to the exhaust only, from engine number XA7 450. In late 1948, from engine number YA7 3402, a new pipe was used that supplied the inlet as well as the exhaust. This pipe was used on all plunger and rigid models.  The 1954-59 swinging arm oil pipe is similar to the plunger version but in 1960 it was split into 2 parts connected by a short length of rubber pipe.

Part No

Description

Per

Model

Years

PACK-INTER-002

Top end overhaul pack A All All

21-2903

Fixing bolt, inlet, inner 3 A7/ST 1947-50

65-1119

Oil feed pipe from YA7 3402 1 A Long stroke 1949-50

67-0026

Rocker box, inlet 1 A7 1947-51

67-0027

Rocker box, exhaust 1 A7 1947-51

67-0044

Fixing bolt 4 A7/ST 1947-50

67-0059

Rocker spindle, inlet 1 A7 1947-48

67-0066

Feeler gauge access plug, alloy 4 A7/ST 1947-49

67-0067

Rocker box cap – not available but can use 70-1564 4 A7 1947-51

67-0259

Rocker box, new old stock 1 Plunger models 1950-57

67-0259U

Rocker box, used 1 Plunger models 1950-57

5897-93

Clip for 42-8327 2 A 1960-62
1

65-2153

Inspection cover nut 8 A 1950-59
1

01-6032

Inspection cover nut 8 A 1960-62
2

02-1462

Inspection cover spring washer 8 A 1950-62
3

65-0306

Oil feed pipe banjo bolt 2 A 1947-53
3

65-0317

Oil feed pipe banjo bolt 2 A 1954-63
4

42-0139

Oil feed pipe, upper 1 A 1960-62
5

67-0280

Inspection cover stud 7 A 1949-59
5

31-0222

Inspection cover stud 7 A 1960-62
6

15-1355

Fixing bolt, short inner 1 A 1950-62
7

67-0343

Inspection cover stud, top rear 1 A 1950-62
8

67-0261

Fixing bolt, long 4 A Plun 1950-57
8

42-0062

Fixing bolt 4 A S’arm 1954-62
9

24-8784

Fixing bolt spring washer 4 A S’arm 1954-62
10

02-0537

Fixing bolt washer 4 A Plun 1950-57
10

02-0923

Fixing bolt plain washer 4 A S’arm 1954-62
11

67-0347

Fixing stud, front 2 A Rig/Plun 1950-57
11

67-1245

Fixing stud, rear 2 A Rig/Plun 1950-57
11

67-1117

Fixing stud, front & rear, alloy head 4 A7SS/10SR 1954-62
11

67-1245

Fixing stud, front & rear, not alloy head 4 A S’arm 1954-62
12

67-0064

Rocker spindle 2 A 1950-62
13

67-0065

Tappet adjuster locknut 4 A 1947-49
13

24-0563

Tappet adjuster locknut 4 A 1950-62
14

67-0056

Tappet adjuster 4 A 1947-62
15

67-0266

Rocker, exhaust left hand 1 A 1950-62
16

67-0060

Thrust washer 6 A 1950-62
17

67-0267

Rocker, exhaust right hand 1 A 1950-62
18

65-0311

Rocker spindle dome nut 2 A 1947-62
19

67-0061

Rocker spindle thrust washer, small 2 A 1947-63
20

67-0062

Spring washer 4 A 1950-62
21

67-0265

Rocker, inlet right hand 1 A 1950-62
22

67-0264

Rocker, inlet left hand 1 A 1950-62
23

67-0161

Oil feed pipe from XA7-450 to YA7 3401 ex only 1 A 1947-49
23

67-0450

Oil feed pipe 1 A Rig/Plun 1950-57
23

42-0048

Oil feed pipe 1 A S’arm 1954-59
24

36-0382

Fixing nut shake proof washer 4 A not alloy heads 1950-62
24

29-7796

Fixing nut washer 4 A alloy heads 1954-62
25

24-6040

Fixing nut, front 2 A plunger 1950-57
25

02-0049

Fixing nut, front 2 A S’arm iron & alloy 1954-62
26

02-0049

Fixing nut, rear 2 A iron heads 1950-62
26

67-1118

Fixing nut, extended, rear 2 A7SS/10SR 1954-62
27

36-0382

Shakeproof washer 5/16 4 A 1954-62
28

42-0139A

Oil feed pipe, lower 1 A 1960-62
29

42-8327

Oil feed pipe, rubber joining piece 1 A 1960-62
30

67-0263

Inspection cover 2 A 1950-62
31

15-0203

Oil feed pipe fibre washer 2 A 1947-63

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