Plate 1
ENGINE and GEARBOX

125c.c.

90-814 Cylinder head 21-5103 Cylinder barrel stud nut 2-923 Cylinder barrel stud washer 66-102 Sparking plug washer 65-114 Sparking plug 65-1776 Sparking plug suppressor 90-816 Cylinder head gasket 90-820 Cylinder barrel 90-736 Cylinder base gasket 90-9 Compression ring 90-337 Piston complete with rings, pegs, gudgeon pin and circlips 90-123 Piston ring peg 90-84 Gudgeon pin 90-85 Gudgeon pin circlip 90-130 Connecting rod bush (small end) 90-1340 Connecting rod, crankpin, rollers and roller cage 90-109 Crankcase dowel 90-111 Cylinder barrel stud 90-749 Crankshaft oil seal (o/s) 89-3023 Crankshaft bearing (o/s) 90-1372 Crankcase with fixed fittings (o/s) 90-117 Primary chain cover gasket 90-112 Dipstick complete 2-2894 Dipstick washer (fibre) 90-10 Crankshaft bearing (o/s) 90-139 Primary chain cover with bushes and dowels 90-124 Primary chain cover screw (long) 65-3062 Primary chain cover screw 90-268 Gear change lever 89-3208 Gear change lever rubber 90-932 Kickstart lever 90-135 Kickstart lever rubber 21-5406 Kickstart and gearchange lever bolt 2-2580 Kickstart and gearchange lever washer 21-5102 Kickstart and gearchange lever nut 90-125 Primary chain cover screw (short) 90-262 Primary chain cover and drain plug washer 90-368 Clutch cover screw 29-3319 Clutch cover screw washer (shakeproof) 90-336 Clutch cover 90-27 Clutch casing snap ring 90-341 Clutch spring cup plate complete 90-30 Clutch spring cup 90-1367 Clutch spring 90-32 Clutch actuating plate complete 90-1318 Clutch driving plate complete 90-37 Clutch driven plate 90-241 Gear selector arm ball 90-46 Gear selector arm spring 90-47 Gear selector arm spring socket 2-2894 Drain plug fibre washer 90-115 Drain plug 90-75 Gearbox mainshaft bearing circlip 90-11 Gearbox mainshaft bearing 90-56 Gear selector arm bracket complete 90-63 Selector arm bracket screw lock washer 90-62 Selector arm bracket screw 90-782 Flywheel complete with shaft (o/s) 90-822 Flywheel complete with shaft (n/s) 90-748 Flywheel side plate 90-12 Gearbox pinion sleeve bearing 90-149 Flywheel magneto key 90-246 Flywheel magneto cam key 90-152 Crankshaft shim 89-3023 Crankshaft bearing (n/s) 90-346 Crankcase fixing screw washer (spring) 65-2158 Crankcase fixing screw (short) 90-3024 Exhaust pipe (standard) 90-265 Exhaust pipe union nut 90-3002 Exhaust pipe union nut washer 90-248 Crankcase cover fixing screw (short) 90-1353 Crankcase cover (nearside) complete 90-110 Crankcase dowel 90-147 Crankshaft oil seal (n/s) 90-798 Crankshaft oil seal retaining circlip (n/s) 90-1373 Crankcase with fixed fittings (n/s) 15-5290 Crankcase cover grease nipple (n/s) 90-122 Clutch operating lever spring 90-108 Crankcase dowel bush 90-184 Clutch operating lever bush 90-261 Crankcase drain plug 90-180 Clutch operating lever complete 90-125 Crankcase fixing screw (long) 90-272 Mainshaft bearing thrust plate gasket 90-133 Mainshaft bearing thrust plate 90-73 Mainshaft oil seal housing gasket 89-3006 Mainshaft oil seal 90-72 Mainshaft oil seal housing 90-71 Gearbox sprocket distance sleeve 90-68 Gearbox sprocket 90-70 Gearbox sprocket lock washer 90-172 Gearbox sprocket nut 90-125 Crankcase cover screw (n/s) 90-106 Clutch operating lever cap 90-105 Clutch adjusting screw 89-366 Clutch adjusting screw lock nut 19-239 Flywheel only (A.C., D.C.) 90-260 Flywheel magneto fixing nut washer 90-259 Flywheel magneto fixing nut 90-257 Flywheel magneto cam washer (plain) 90-258 Flywheel magneto cam washer (spring) 90-256 Flywheel magneto cam screw 19-284 Flywheel generator only (A.C./D.C.) 2-2580 Flywheel magneto fixing screw washer 65-2158 Flywheel magneto fixing screw 90-450 Mainshaft oil seal housing (must be fitted when 90-299 engine sprocket is fitted) 2-498 Mainshaft oil seal housing screw 29-3319 Mainshaft oil seal housing washer 90-67 Mainshaft primary drive gear bush 90-65 Mainshaft primary drive gear complete 90-1357 Mainshaft gear 90-1354 Gearbox mainshaft 89-5015 Clutch push rod ball 90-132 Clutch push rod bush (rubber) 90-83 Layshaft bush 90-98 Clutch push rod (short) 90-99 Clutch push rod (long) 90-76 Clutch chainwheel distance bush 90-24 Clutch chainwheel circlip 90-40 Kickstarter pinion spring retainer 90-39 Kickstarter pinion spring 90-177 Kickstarter pinion 90-120 Crankshaft sprocket 90-134 Primary chain 35-1896 Crankshaft sprocket key 90-121 Crankshaft sprocket lock washer 90-340 Crankshaft nut 90-175 Clutch chainwheel complete 90-283 Clutch chainwheel thrust washer 90-28 Clutch hub 15-39 Mainshaft washer 90-340 Mainshaft nut 90-82 Layshaft gear 90-83 Layshaft bush 90-61 Swivel pin peg 90-60 Gear selector arm spring cup 90-59 Gear selector arm retaining spring 90-90 Kickstarter quadrant spring plate 90-89 Kickstarter quadrant spring 90-179 Kickstarter quadrant only 90-88 Kickstarter quadrant spindle only 90-1143 Gear selector fork shaft 90-51 Gear selector fork spring ring 90-54 Gear selector fork spring cup 90-55 Gear selector fork spring cup ring 90-1288 Gear selector fork spring 90-190 Gear selector fork and peg 90-759 Gear selector shaft thrust pad 90-1365 Gear selector arm complete 90-1360 Layshaft gear 90-1359 Layshaft only (standard) 90-353 Layshaft gear

Plate Ref. Number.ModelsPart No.DescriptionNumber per set
1

125c.c. 90-814 Cylinder head 1
2

125c.c. 21-5103 Cylinder barrel stud nut 4
3

125c.c. 2-923 Cylinder barrel stud washer 4
4

125c.c. 66-102 Sparking plug washer 1
5

125c.c. 65-114 Sparking plug 1
6

125c.c. 65-1776 Sparking plug suppressor 1
7

125c.c. 90-816 Cylinder head gasket 1
8

125c.c. 90-820 Cylinder barrel 1
9

125c.c. 90-736 Cylinder base gasket 1
10

125c.c. 90-9 Compression ring (standard) 2
10

125c.c. 90-278 Compression ring (.020" oversize) 2
10

125c.c. 90-394 Compression ring (.040" oversize) 2
11

125c.c. 90-337 Piston complete with rings, pegs, gudgeon pin and circlips (standard) 1
11

125c.c. 90-338 Piston complete with rings, pegs, gudgeon pin and circlips (.020" oversize) 1
11

125c.c. 90-388 Piston complete with rings, pegs, gudgeon pin and circlips (.040" oversize) 1
12

125c.c. 90-123 Piston ring peg 2
13

125c.c. 90-84 Gudgeon pin 1
14

125c.c. 90-85 Gudgeon pin circlip 2
15

125c.c. 90-130 Connecting rod bush (small end) 1
16

125c.c. 90-1340 Connecting rod, crankpin, rollers and roller cage 1
17

125c.c. 90-109 Crankcase dowel 2
18

125c.c. 90-111 Cylinder barrel stud 4
19

125c.c. 90-749 Crankshaft oil seal (o/s) 1
20

125c.c. 89-3023 Crankshaft bearing (o/s) 1
21

125c.c. *90-1372 Crankcase with fixed fittings (o/s) 1
22

125c.c. 90-117 Primary chain cover gasket 1
23

125c.c. 90-112 Dipstick complete 1
24

125c.c. 2-2894 Dipstick washer (fibre) 1
25

125c.c. 90-10 Crankshaft bearing (o/s) 1
26

125c.c. 90-139 Primary chain cover with bushes and dowels 1
27

125c.c. 90-124 Primary chain cover screw (long) 2
28

125c.c. 65-3062 Primary chain cover screw 2
29

125c.c. 90-268 Gear change lever 1
30

125c.c. 89-3208 Gear change lever rubber 1
31

125c.c. 90-932 Kickstart lever 1
32

125c.c. 90-135 Kickstart lever rubber 1
33

125c.c. 21-5406 Kickstart and gearchange lever bolt 2
34

125c.c. 2-2580 Kickstart and gearchange lever washer 2
35

125c.c. 21-5102 Kickstart and gearchange lever nut 2
36

125c.c. 90-125 Primary chain cover screw (short) 1
37

125c.c. 90-262 Primary chain cover and drain plug washer 7
38

125c.c. 90-368 Clutch cover screw 3
39

125c.c. 29-3319 Clutch cover screw washer (shakeproof) 3
40

125c.c. 90-336 Clutch cover 1
41

125c.c. 90-27 Clutch casing snap ring 1
42

125c.c. 90-341 Clutch spring cup plate complete 1
43

125c.c. 90-30 Clutch spring cup 6
44

125c.c. 90-1367 Clutch spring 6
45

125c.c. 90-32 Clutch actuating plate complete 1
46

125c.c. 90-1318 Clutch driving plate complete 3
47

125c.c. 90-37 Clutch driven plate 2
48

125c.c. 90-241 Gear selector arm ball 1
49

125c.c. 90-46 Gear selector arm spring 1
50

125c.c. 90-47 Gear selector arm spring socket 1
51

125c.c. 2-2894 Drain plug fibre washer 1
52

125c.c. 90-115 Drain plug 1
53

125c.c. 90-75 Gearbox mainshaft bearing circlip 1
54

125c.c. 90-11 Gearbox mainshaft bearing 1
55

125c.c. 90-56 Gear selector arm bracket complete 1
56

125c.c. 90-63 Selector arm bracket screw lock washer 2
57

125c.c. 90-62 Selector arm bracket screw 2

125c.c. 90-1334 Flywheel and connecting rod assembly 1
58

125c.c. 90-782 Flywheel complete with shaft (o/s) 1
59

125c.c. 90-822 Flywheel complete with shaft (n/s) 1
60

125c.c. 90-748 Flywheel side plate 2
61

125c.c. 90-12 Gearbox pinion sleeve bearing 1
62

125c.c. 90-149 Flywheel magneto key 1
63

125c.c. 90-246 Flywheel magneto cam key 1
64

125c.c. 90-152 Crankshaft shim (.003") as reqd.
64

125c.c. 90-153 Crankshaft shim (.004") as reqd.
64

125c.c. 90-154 Crankshaft shim (.005") as reqd.
64

125c.c. 90-155 Crankshaft shim (.010") as reqd.
65

125c.c. 89-3023 Crankshaft bearing (n/s) 1
66

125c.c. 90-346 Crankcase fixing screw washer (spring) 11
67

125c.c. 65-2158 Crankcase fixing screw (short) 9
68

125c.c. 90-3024 Exhaust pipe (standard) 1
69

125c.c. 90-265 Exhaust pipe union nut 1
70

125c.c. 90-3002 Exhaust pipe union nut washer 1
71

125c.c. 90-248 Crankcase cover fixing screw (short) 2
72

125c.c. 90-1353 Crankcase cover (nearside) complete 1
73

125c.c. 90-110 Crankcase dowel 2
74

125c.c. 90-147 Crankshaft oil seal (n/s) 1
75

125c.c. 90-798 Crankshaft oil seal retaining circlip (n/s) 1
76

125c.c. *90-1373 Crankcase with fixed fittings (n/s) 1
77

125c.c. 15-5290 Crankcase cover grease nipple (n/s) 1
78

125c.c. 90-122 Clutch operating lever spring 1
79

125c.c. 90-108 Crankcase dowel bush 2
80

125c.c. 90-184 Clutch operating lever bush 1
81

125c.c. 90-261 Crankcase drain plug 1
82

125c.c. 90-180 Clutch operating lever complete 1
83

125c.c. 90-125 Crankcase fixing screw (long) 4
84

125c.c. 90-272 Mainshaft bearing thrust plate gasket 1
85

125c.c. 90-133 Mainshaft bearing thrust plate 1
86

125c.c. 90-73 Mainshaft oil seal housing gasket 1
87

125c.c. 89-3006 Mainshaft oil seal 1
88

125c.c. 90-72 Mainshaft oil seal housing 1
89

125c.c. 90-71 Gearbox sprocket distance sleeve 1
90

125c.c. 90-68 Gearbox sprocket (15T) (standard) 1
90

125c.c. 90-299 Gearbox sprocket (14T) (as required) 1
90

125c.c. 90-473 Gearbox sprocket (16T) (as required) 1
91

125c.c. 90-70 Gearbox sprocket lock washer 1
92

125c.c. 90-172 Gearbox sprocket nut 1
93

125c.c. 90-125 Crankcase cover screw (n/s) 3
94

125c.c. 90-106 Clutch operating lever cap 1
95

125c.c. 90-105 Clutch adjusting screw 1
96

125c.c. 89-366 Clutch adjusting screw lock nut 1
97

125c.c. 19-239 Flywheel only (A.C., D.C.) 1
98

125c.c. 90-260 Flywheel magneto fixing nut washer 1
99

125c.c. 90-259 Flywheel magneto fixing nut 1
100

125c.c. 90-257 Flywheel magneto cam washer (plain) 1
101

125c.c. 90-258 Flywheel magneto cam washer (spring) 1
102

125c.c. 90-256 Flywheel magneto cam screw 1

125c.c. 90-959 Flywheel and generator complete (direct lighting) 1

125c.c. 90-960 Flywheel and generator complete (battery lighting) 1
103

125c.c. 19-284 Flywheel generator only (A.C./D.C.) 1
104

125c.c. 2-2580 Flywheel magneto fixing screw washer 3
105

125c.c. 65-2158 Flywheel magneto fixing screw 3
106

125c.c. 90-450 Mainshaft oil seal housing (must be fitted when 90-299 engine sprocket is fitted) 1
107

125c.c. 2-498 Mainshaft oil seal housing screw 5
108

125c.c. 29-3319 Mainshaft oil seal housing washer 5
109

125c.c. 90-67 Mainshaft primary drive gear bush 2
110

125c.c. 90-65 Mainshaft primary drive gear complete (standard) 1
110

125c.c. 90-474 Primary drive gear complete (alternative) 1
111

125c.c. 90-1357 Mainshaft gear (22T) (standard) 1
111

125c.c. 90-458 Mainshaft sliding gear (21T) (standard) 1
112

125c.c. 90-1354 Gearbox mainshaft (standard) 1
112

125c.c. 90-445 Gearbox mainshaft (alternative) 1
113

125c.c. 89-5015 Clutch push rod ball 1
114

125c.c. 90-132 Clutch push rod bush (rubber) 1
115

125c.c. 90-83 Layshaft bush 1
116

125c.c. 90-98 Clutch push rod (short) 1
117

125c.c. 90-99 Clutch push rod (long) 1
118

125c.c. 90-76 Clutch chainwheel distance bush 1
119

125c.c. 90-24 Clutch chainwheel circlip 1
120

125c.c. 90-40 Kickstarter pinion spring retainer 1
121

125c.c. 90-39 Kickstarter pinion spring 1
122

125c.c. 90-177 Kickstarter pinion 1
123

125c.c. 90-120 Crankshaft sprocket 1
124

125c.c. 90-134 Primary chain 1
125

125c.c. 35-1896 Crankshaft sprocket key 1
126

125c.c. 90-121 Crankshaft sprocket lock washer 1
127

125c.c. 90-340 Crankshaft nut 1
128

125c.c. 90-175 Clutch chainwheel complete 1
129

125c.c. 90-283 Clutch chainwheel thrust washer 1
130

125c.c. 90-28 Clutch hub 1
131

125c.c. 15-39 Mainshaft washer 1
132

125c.c. 90-340 Mainshaft nut 1
133

125c.c. 90-82 Layshaft gear (32T) (standard) 1
133

125c.c. 90-448 Layshaft gear (28T) (alternative) 1
134

125c.c. 90-83 Layshaft bush 1
135

125c.c. 90-61 Swivel pin peg 1
136

125c.c. 90-60 Gear selector arm spring cup 1
137

125c.c. 90-59 Gear selector arm retaining spring 1
138

125c.c. 90-90 Kickstarter quadrant spring plate 1
139

125c.c. 90-89 Kickstarter quadrant spring 1

125c.c. 90-178 Kickstarter quadrant with spindle 1
140

125c.c. 90-179 Kickstarter quadrant only 1
141

125c.c. 90-88 Kickstarter quadrant spindle only 1
142

125c.c. 90-1143 Gear selector fork shaft 1
143

125c.c. 90-51 Gear selector fork spring ring 1
144

125c.c. 90-54 Gear selector fork spring cup 1
145

125c.c. 90-55 Gear selector fork spring cup ring 1
146

125c.c. 90-1288 Gear selector fork spring 1
147

125c.c. 90-190 Gear selector fork and peg 1
148

125c.c. 90-759 Gear selector shaft thrust pad 1
149

125c.c. 90-1365 Gear selector arm complete 1
150

125c.c. 90-1360 Layshaft gear (25T) (standard) 1
150

125c.c. 90-457 Layshaft sliding gear (26T) (alternative) 1
150

125c.c. 90-449 Layshaft sliding gear (25T) (alternative) 1

125c.c. 90-1358 Layshaft with gear (19T) (standard) 1
151

125c.c. 90-1359 Layshaft only (standard) 1

125c.c. 90-476 Layshaft with gear (23T) (alternative) 1
152

125c.c. 90-353 Layshaft gear (19T) (standard) 1
152

125c.c. 90-447 Layshaft gear (23T) (alternative) 1