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350 BULLET 1950
Royal Enfield 350 BULLET 1950 User Manual
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ROY
AL
ENFIELD WORKSHOP
MANUAL
WORKSHOP
MA
INTENANCE M
ANU
AL
FOR THE
Ro
y
al
Enfield
350 BULLE
T 1949
—
55
500 BULLE
T 1953
—
55
MAN 8
www.hitchcocksmotorcycles.com
2
Table of Contents
Table of Contents
2
350 Bullet 1951
3
350 Bullet 1955
3
Technical Data
4
SECTION A2A
4
SECTION A2B
6
Engine Specification
8
Engine
8
Cylinder Head
8
Cylinder
8
Section B2
8
Air Filter
9
Carburetter
9
Timing Drive
9
Ignition and Lighting System
9
Lubrication System
10
Breather
10
Gearbox
10
Clutch
10
350 Bullet Oil Pump Diagrams
11
Feed Pump Position
11
Return Pump Position
11
350 + 500 Bullet Scrambles 1954
13
350 Bullet Trials 1951
13
Removal of the Timing Cover
14
Service Operations with Engine in Frame
14
500 Bullet 1953 - 1955
14
350 Bullet 1949 - 1955
14
Section C2
14
Removal of the Petrol Tank
15
Removal of the Cylinder Head
15
Ignition Timing
15
Removal of the Valves
16
Removal of the Valve Guides
16
Removal of the Cylinder
16
Removal of the Piston
16
Cleaning the Oil Filter
17
Grinding in the Valves
17
Reassembly after Decarbonising
17
Decarbonising
17
Overhaul of Oil Pumps
18
Removal of Pump Worm and Timing Pinion
18
Removal of the Magdyno Pinion
18
Primary Chain Adjustment
18
Removal of the Engine Sprocket
19
Removal of the Clutch
19
Removal of the Tappets and Guides
19
Pressure Relief Valves
19
Removal of the Magdyno
20
“350 and 500 Bullet” Engines
22
Removal of the Engine from the Frame
22
Main Bearings
22
Removal of the Gear Box
22
Section D2
22
Flywheel Assembly
23
Reassembly of the Crankcase
24
Gearbox and Clutch
26
Removal of Gearbox
26
To Dismantle the Gearbox
26
Exploded View of Clutch
26
Section E1
26
Exploded View of Gearbox
27
Removal of the Ball Races
28
Gear Change Mechanism
28
Dismantling and Re-Assembly of the Clutch
28
Adjustment of the Clutch Control
28
Adjustment of the Neutral Finder
29
Gearbox Oil Level
29
Clutch Adjustment on Current Gearboxes
29
Clutch Lever and Cable Adjustments on Early Gearboxes
29
Carburetter with Pilot Jet System
30
Two Designs
30
Section F1
30
How It Works and Parts Names
31
Hints and Tips
31
Section F4
31
How to Trace Faults
32
Parts to Tune up with
32
Throttle Stop Screw
32
Pilot Air Screw
32
How to Tune up
33
Tuning Twin Engines with Twin Carburetors
33
1St Main Jet
33
2Nd Pilot Jet with Throttle in Positions
33
Tuning the Carburetter
34
General Description
34
Amal Monobloc Carburetter
34
First-Main Jet
35
Exploded View of Monobloc Carburetor
36
Dismantling Carburetter
37
Causes of High Petrol Consumption
37
Model MOIL for Single Cylinder Engines
38
General
38
Routine Maintenance
38
Lubrication
38
SECTION G1C
38
Renewing Timing Control Cable
39
Cleaning
39
Check Every 3,000 Miles
39
Adjustments
39
Contact Breaker Spring
40
Testing Magdyno in Position on Engine
40
Lucas Dynamo Model E3LM
42
Test Data
42
Testing in Position to Locate Fault in Charging Circuit
42
Inspection of Commutator and Brush Gear
42
SECTION G2B
42
To Dismantle
43
Field Coil
44
Commutator
44
Armature
45
Bearings
45
Dynamo Polarity
45
Reassembly
45
Control Box
46
Setting Data
46
Servicing
46
Checking the Wiring between Battery and Regulator
46
SECTION G3A
46
Checking the Electrical Setting of the Cutout
47
Adjusting the Electrical Setting of the Cutout
47
Adjusting the Electrical Setting of the Regulator
47
Battery Model PUZ7E
48
Preparation for Service
48
SECTION G4A
48
Head and Tail Lamps
50
Headlamp
50
Lucas Light Unit
50
SECTION G5A
50
Replacing the Light Unit and Bulb
51
Parking Lights
51
Tail Light
51
Motor Cycle Prices
53
Frame
54
Section H1
54
Description of Frame
55
Steering Head Races
55
Removal of Rear Suspension Unit
55
Servicing Rear Suspension Units
55
Removal of Swinging Arm Chain Stays
57
Centre Stand
57
Wheel Alignment
58
Front Fork
60
Operation of the Fork
60
Section of Fork Leg
60
Main Tube Seal Guide
61
Main Tube Spanner
61
Dismantling the Fork to Replace Spring, Oil Seal or Bearing Bushes
61
Spring
62
Reassembly of Parts
62
Removal of Complete Fork
62
Outer Cover Centralising Bushes
62
Air Vents
63
Operation of Fork
64
Section J3
64
Removal of Main Tubes
67
Section J4
68
Sectioned View of Telescopic Fork
69
Removal of Brake Shoes and Springs
72
Removal of Brake Cover Plate Assemblies
72
Front Wheel
72
Removal from Fork
72
Section K1
72
Replacing Brake Linings
73
Hub Bearings
73
Fitting Limits for Bearings
73
Refitting Ball Bearings
73
Reassembly of Brake Shoes Onto Cover Plates
74
Floating Cam Housings
74
Refitting Brake Cover Plates
74
Wheel Rim
74
Tyre Pressure
75
Spokes
75
Tyre
75
Wheel Building and Truing
75
Removal of Brake Cover Plate Assy
76
Removal of Hub Spindle and Bearings
76
Section K2
76
Floating Cam
78
Wheel Rims
78
Refitting Brake Cover
78
Wheel Lacing
79
Tyre Pressures
80
Detachable Rear Wheel
82
Rear Wheel (Detachable Type)
82
Section L1
82
Removal and Replacement of Complete Wheel for Access to Brake
83
Removal of Main Portion of Wheel
83
Removal of Brake Shoes for Replacement Fitting New Linings, Etc.
84
Cush Drive
84
Re-Assembly of Cush Drive
84
Removal of Ball Bearings
85
Rear Wheel (Non-Detachable Type)
88
Section L2
88
Special Tools
94
Section M2
94
4
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Royal Enfield 350 BULLET 1950 Specifications
General
Brand
Royal Enfield
Model
350 BULLET 1950
Category
Motorcycle
Language
English
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