B.
Ball valve assembly .. .. 19
Ball valve assembly. ..(Illustration) .. ..17
Ballrace retaining ring tool. (Illustration) .. .. .. 49
Battery. Filling and charging 76
Battery. Maintenance and storage of .. .. .. 77
Big-end bearing. Overhauling .. .. .. .. 42
Big-end rollers. Oversizes of 42
Brake assembly. Front .. 10
Brake assembly. Rear .. 53
Brake adjustment. Rear. (Illustration) .. .. .. 81
Brakes. Relining .. .. 51

C.
Carburetter. (Illustration) .. 61
Carburetter. Sectional view .. 58
Carburetter, Description of . . 59
Carburetter. Dismantling, etc. 59
Carburetter. Setting and ..adjusting .. .. . . 61
Chain adjustment. (Primary) 80
Chain adjustment. (Primary) .. (Illustration) .. .. 35
Chain adjustment. (Rear) .. 80
Chain adjustment. (Rear) (Illustration) .. . . .. 81
Cleaning the machine .. 58
Clutch. Description of working.. 27
Clutch. Diagram of operating mechanism .. .. .. 27
Clutch. Dismantling . . 46
Clutch. Reassembling . . 47
Clutch. Adjustment of .. 28
Clutch adjustment. (Illustration) . . . . . . .. 28
Clutch thrust bearing .. 47
Commutator. Cleaning .. 71
Commutator connections. (Illustration) .. .. 68

Crankcase. Separating . . 41
Crankcase. Main bearings. 41
Crankcase suction filter . . 20
Crankcase suction filter. (Illustration) 38
Crankshaft timing-pinion. Removal of . . . . . . 40
Crankshaft-pinion extractor. (Illustration) . . . . .. 38
Cut-out. Adjustment of .. 74
Cut-out. (Illustration) . . 73
Cylinder. Removal of .. 36
Cylinder. Refitting . . .. 43
Cylinder bore diameter . . 36
Cylinder head. Removal of .. 23
Cylinder head. Refitting .. 24

D.
Decarbonising and grinding in valves . . . . . . 22
Dynamo belt adjustment .. 21
Dynamo belt adjustment (Illustration) .. . . . . 21
Dynamo belt cover. Removal of .. . 31
Dynamo. Dismantling and reassembling . . .. 69
Dynamo. Exploded view 70
Dynamo. Removal of .. 31
Dynamo. Testing .. . . 69
Dynamo. Special spanner .. 71

E.
Engine bearings . . . . 41
Engine lubrication system . . 17
Engine. Overhauling . . 36
Engine. Removal from frame 35
Engine shaft shock absorber .. 22

F.
Fabric oil filter.. .. . . 22
Fabric oil filter. (Illustration) 17
Flywheel assembly. Lining up . . . . . . . . 43
Flywheel assembly. Overhauling 42
Flywheel assembly. Refitting 41
Fork. Description of working 12
Fork. Dismantling .. .. 15
Fork. Maintenance of . . 15
Fork. Reassembling .. .. 16
Fork. (Sectional illustration) .. 13

G.
Page.
Gearbox bearings .. .. 48
Gearbox. Dismantling 47
Gearbox end cover. (Illustration) .. . . .. 35
Gearbox. Reassembling . . 50
Gearbox. Removal from frame .. .. .. .. 35
Gearbox. Separating from engine .. .. .. .. 36
Gear operating mechanism .. 48

H.
Headlamp. (Illustration) .. 67
Hub (Front). (Sectional illustration) 9
Hub. (Rear). (Sectional illustration) 52
Hub bearings. (Front). Dismantling .. .. .. 10
Hub bearings. (Rear). Dismantling .. .. .. 52

I.
Intermediate timing gear adjustment .. .. .. 45
Intermediate timing gear. (Illustration) . . .. . . 45
Index to Illustrations . . 5

K.
Kickstart mechanism. (Illustration) .. . . .. 34
Kickstart mechanism. Dismantling .. . . .. 33
Kickstart mechanism. Reassembling .. .. .. 35
Kickstart return spring. Replacing.. .. .. .. 34

L.
Lamps .. .. .. .. 66
Lamp bulbs .. .. .. 66
Lighting set .. .. .. 66
Lighting wiring diagram .. 74
Lubrication of chains . . 80
Lubrication of engine .. 17
Lubrication of fork .. .. 15
Lubrication of gearbox .. 51
Lubrication of magneto .. 78
Lubrication of wheel bearings 10 &52

M.
Main bearings. Removal .. 41
Main bearings. Refitting .. 41
Magneto. Maintenance .. 78
Magneto. Removal .. .. 79
Magneto. Refitting .. .. 80
Magneto. Testing .. .. 79
Magneto. Timing .. .. 46
Magneto. (Illustration) .. 78

0. Page.
Oil circulation system . . 17
Oil filter (Suction) .. .. 20
Oil filter (Suction). (Illustration) . . . . . . . . 20
Oil filter (Fabric) .. . . 20
Oil filter (Fabric). (Illustration) 17
Oil-pump. Priming .. 18
Oil-pump. Overhaul . . 18
Oil-pump. Removal .. 38
Oil-pump. Removal. (Illustration) .. .. . . 38
Oil-pump alignment tool. (Illustration) .. . . .. 39
Oil. Recommended grades.. 8

P.
Phases of throttle opening. (Illustration) 62
Petrol tap and strainer. (Illustration) .. . . - . 64
Piston. Removal .. .. 36
Piston. Refitting . . .. 44
Piston ring gaps . . .. 36
Primary chain. Removal .. 31
Primary chain. Refitting .. 32
Primary chain adjustment. (Illustration) - . . . . . 35
Primary chain case. Removal 31
Primary chain case. Refitting 32

R.
Rear suspension. Adjustment 53
Rear suspension adjustment. (Illustration) . . .. 54
Rear suspension. Maintenance .. .. .. .. 53
Rear suspension units .. 53
Rocker box. Removal .. 22
Rocker box. Refitting . . 25

S.
Shock absorber. Removal .. 22
Sleeve gear nut. Refitting .. 31
Sleeve gear nut adaptor. (Illustration) . . .. . . 33
Sleeve gear nut and spanner. (Illustration) 32
Sparking plugs. Recommended types 63
Sparking plug. Maintenance 64
Sparking plug. (Illustration) .. 65

Steering head bearing. Adjustment .. .. .. .. 11
Steering head bearing tool. (Illustration) .. .. .. 14

T.
Tappet adjustment. (Illustration) .. .. .. .. 24
Tappet clearances .. .. 25
Technical data .. .. .. 6
Theoretical wiring diagram .. 75
Timing gear .. .. . . 44
Timing gear markings. (Illustration) 45
Timing-pinion. Removal .. 40
Timing cover. Removal .. 37
Torque arms. Removal .. 56
Torque arms. Realignment 57
Torque arm clamp tool. (Illustration) 56
Transfers. Instructions for fixing 81
Trunnion shaft. Removal .. 56
Page.
Trunnion shaft. Refitting .. 57
Tyres. Maintenance .. .. 82
Tyre pressures .. .. .. 82

V.
Valves. Refacing and grinding in .. .. .. .. 23
Valves. Removal. (Illustration) 23
Valve guide. Renewal .. 26
Valve guide location. (Illustration) .. .. .. 26
Voltage regulator. Testing and adjusting .. .. 72

W.
Wheel bearings (Front). Removal .. .. .. 10
Wheel bearing (Rear). Removal .. .. . . 52
Wheel bearings .. 10 & 52