Cylinder & Crank

Gasket sets are at the bottom.

Number	Part Number	Description	Per	Model
NI	4047	Liner	1	All
NI	PACK-ADV-002	Valve & guide pack	A	All
NI	PACK-ADV-007	Oil feed/return pack	A	All
NI	PACK-INTER-002	Top end overhaul pack	A	All
NI	PACK-START-005	Exhaust pack	A	All
1	19-7621	Plug Cover	1	All
2	19-7606	Spark plug B8ES	1	All
3	66-0102	Spark Plug washer	1	1967-70
4	46-0695	Nut	2	1967
4	14-0403	3/8 UNF lock nut	2	1969-71
4	46-0066	Nut, rocker spindle	2	1968
5	02-2138	Washer	2	All
6	40-0968	Rocker box cap	2	All
7	40-0969	Rocker cap gasket	2	All
8	40-0963	Rocker box gasket	1	1967
8	70-7858	Rocker box gasket	1	1968-70
8	71-2198	Rocker box gasket	1	1971-
9	76-0378	Alloy washer	1	1969-71
9	24-6040	Half Nut	1	1969
10	76-0308	Oil pipe adapter	1	All
11	29-2089	3/16 union nut	1	All
12	40-0997	Oil pipe with nut & spigot	1	1969
12	40-0993	Rocker feed pipe	1	1969-71
13	40-0939	Rocker box stud	2	1967-70
13	14-1628	Head stud 5/16×3 1/4	2	1971-
14	66-3074	Dowel	2	1967-70
14	71-1989	Dowel	2	1971-
15	40-0942	Rocker box stud	2	1967-70
15	14-1627	Cylinder Head Stud	2	1971-
16	40-0127	Stud	2	1967-70
16	21-2092	Rocker box stud 5/16UNCFx3 1/4	2	1971-
17	40-0940	Stud	3	1969
17	14-1629	Stud, 5/16 x 3.5 UNC/F	3	1971-
17	70-7996	Stud	3	1969-70
18	46-0044	Nut	1	1967-68
19	02-0525	1/4 plain washer	1	1967-68
20	71-2938	Exhaust lifter arm (41-0176)	1	1967-68
21	40-1000	Exhaust lifter cup	1	1967-68
22	40-0418	O’ ring	1	1967
22	68-0289	O’ ring	1	1968
23	40-0999	Valve Lifter	1	1967-68
24	24-6040	Half Nut	2	1967-70
24	14-0302	5/16 UNF nut	2	1971-
25	02-0923	Washer	2	All
26	40-0209	Nut 1/4 CEI Nyloc	7	1967-70
26	14-1302	Nut, 5/16 UNF	7	1971-
27	02-0525	1/4 plain washer	7	1967-70
28	40-0961	Rocker Box	1	1967
28	70-7818	Rocker Box	1	1968
28	70-7911	Rocker Box	1	1969-70
29	68-0662	Exhaust valve	1	1967
29	70-7777	Exhaust valve	1	1968-71
29	71-2196	Exhaust Valve	1	1971-
30	40-0932	Exhaust valve guide	1	1967-70
30	71-2226	Exhaust valve guide	1	1971-
31	40-0158	Rocker thrust washer	2	All
32	40-0156	Rocker spring	2	1967
33	40-0989	Inlet Rocker	1	1967
33	70-7790	Rocker inlet	1	1968-71
34	40-0990	Exhaust rocker	1	1967
34	70-7791	Exhaust Rocker	1	1968-71
35	40-0157	Spindle washer	2	All
36	40-0994	Rocker spindle	1	1967
36	70-7787	Rocker Spindle	1	1968-71
37	40-0967	Rocker spindle inspection gasket	1	1967-70
37	71-1425	Rocker spindle inspection gasket	1	1971-
38	40-0966	Inspection Cover	1	All
39	40-0965	Rocker inspection cover screw	2	All
40	40-1010	Inlet push rod	1	All
40	40-1021	Exhaust push rod	1	All
41	24-5160	Nut, 5/16″x26 TPI	2	All
42	02-0923	Washer	2	1967-70
43	40-0933	Head gasket	1	All
44	76-0028	Stud	2	1968
44	40-0020	Stud 5/16×2 3/4	2	1969-71
45	40-2712	Nut	1	1967-70
46	41-0668	Tappet	2	All
46	70-7739	Tappet	2	All
47	40-2710	Finned clamp	1	1967-70
48	40-2711	Screw	1	1967-70
49	40-2845	Exhuast pipe	1	1967-68
49	70-9412	Exhuast pipe high level	1	1969
49	70-9724	Exhuast pipe	1	1969-70
49	71-1178	Exhaust pipe High level	1	1970
49	71-2176	Exhuast pipe	1	1971-onwards
50	40-0949	Cylinder Barrel	1	1969
50	70-9263	Cylinder Barrel	1	1969-71
51	40-0953	Base gasket	1	1967
51	70-7728	Base gasket	1	1968-70
51	71-2233	Base gasket	1	1971-onwards
52-54	R11640 / STD / 10 / 20 / 40 / 60	Piston Rings Standard – 60	1	All
55	16945 /STD /20 /40 /60 /80	Piston, c.r. 9:5 or 10:1, complete	1	All
56	40-0978	Gudgeon pin	1	1967-70
56	70-6861	Gudgeon pin	1	1971-
57	40-979	Piston circlip	2	1967-70
57	70-6869	Piston circlip	2	1971-
58	24-0732	Bearing	1	1967-70
59	40-0066	Shim	–	All
60	40-1024	Crankshaft	1	1969
60	70-9547	Crankshaft	1	1969
60	70-9848	Crankshaft	1	1970
60	71-2284	Crankshaft	1	1971-
61	41-0560	Key	1	All
62	40-1027	Flywheel right hand	1	1969
62	70-9907	Flywheel right hand	1	1969-70
62	71-2288	Flywheel right hand	1	1971-
63	2-0049	5/16 nut	2	1967
63	42-4476	3/8 CEI Nyloc nut	2	1968-70
64	24-8784	Spring washer, 5/16	1	1967
65	65-1162	Carb gasket	2	1967
66	40-0913	Big end bolt	1	1967-70
66	70-9914	Big end Bolt	1	1971-
67	65-1238	Carburettor insulator	1	1967
67	70-7820	Inlet gasket	1	1968-71
68	65-1232	Gasket, carb	1	1967-70
68	71-1416	Carburetter Gasket	1	1971-
69	68-0018	Stud 5/16 x 1 27/64	2	1967-70
69	14-1620	Stud 5/16×1 3/8 UNF/C	2	1971-
70	40-0929	Cylinder Head	1	1967-70
70	71-2238	Cylinder head B25	1	1971-
71	68-0661	Inlet valve	1	All
72	40-1018	Valve spring bottom cup	2	1967-70
72	71-2366	Valve spring cup	2	1971-
73	40-0931	In valve guide	1	1967-70
73	71-2231	Inlet valve guide	1	1971-
74	40-1008	Valve Spring Outer	2	1969
74	40-1009	Outer valve spring	2	1969-70
74	71-2223	Outer valve spring B25	2	1971-
75	40-0998	Oil Pipe	1	1967
75	40-1037	Rocker oil feed pipe	1	1968-70
76	68-0158	Collet A50 etc	4	1967
76	71-1166	Collet	4	1968-70
77	40-1019	V/spring top collar	2	1967-69
77	40-1165	Valve Spring Collar	2	1970
77	71-1165	Top collar	2	1971-
78	40-1007	Inner spring	2	All
79	40-0916	Small end bush	1	1968-70
80	40-0908	Connecting rod	1	1967
80	70-8836	Con rod	1	1968-70
80	70-9911	Con Rod	1	1971-
81	40-0907	Big end Shells,pr, std	1	All
81	40-0917	Big end shells .010	1	All
81	40-0918	Big end Shells, 020	1	All
81	40-0919	Big end shells .030	1	All
82	40-0915	Big end nut	2	1967-70
82	21-2016	Big end Locknut	2	1971-
83	24-0732	Bearing	1	1967
83	24-0724	Main bearing, Drive side inner	1	1968-70
84	41-0673	Camshaft key	1	All
85	40-1030	Flywheel bolt 3/8UFx1 1/8	4	All
86	68-0582	Thrust washer,	8	All
87	40-1029	Flywheel Right hand	1	1969
87	70-9906	Flywheel LH	1	1969-70
87	71-2287	Flywheel LH B25	1	1971-
88	40-0892	Sludge plug	1	All
89	40-1031	Flywheel bolt	4	All
93	62-0263	Hose clip for oil pipe	1	1968-70
–	68-5197	Fibre washer, inspection cover screw	1	1971
–	GS335	Gasket set B25/C25 1967-70
–	GS835	Gasket set B25 71-72		1971-

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Cylinder & Crank

Number

Part Number

Description

Per

Model

NI

NI

NI

NI

NI

1

2

3

4

4

4

5

6

7

8

8

8

9

9

10

11

12

12

13

13

14

14

15

15

16

16

17

17

17

18

19

20

21

22

22

23

24

24

25

26

26

27

28

28

28

29

29

29

30

30

31

32

33

33

34

34

35

36

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