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Beta RR250 - Page 15
126 pages
Manual
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1
13
19
ENGI
N
E
REMO
V
AL
FROM
VEHICLE
A
T
TENTION!
When the mixer tube has been disconnected,
plug it to prevent emptying.
•
Loosen the carburettor straps from the air fil
-
ter sleeve and from the manifold.
•
Disconnect the connector
19
.
14
16
Table of Contents
Main Page
Table of Contents
2
Introduction
4
Engine Technical Specifications
6
Special Equipment
7
Engine Removal from Vehicle
8
Engine Disassembly
19
Clutch/Gear Oil Drain
19
Removal of Clutch Control Rod and
19
Removal of Piston, Cylinder and Head
20
Removal of Ignition Unit
23
Removal of Flywheel Cover
23
Stator Removal
23
Removal of Flywheel
24
Removal of Pick-Up Unit
24
Removal of Electric Ignition
25
Removal of Start Motor
26
Removal of Bendix Coupling
26
Unit, Main Gear, Centrifugal Unit
27
Gearshift Organs, Kickstart
27
Removal of Coolant Liquid Pump
30
Removal of Centrifugal Unit and Leverage
31
Disassembly of Clutch Unit and Countershaft Counterweight
34
Pedal Kickstart - Optional
38
External Gearshift Unit
40
Intake System
41
Crankshaft, Gearbox Unit and Internal Gearshift
42
Opening the Crankcase
42
Counterweight Support Shaft
43
Crankshaft
43
Internal Gearshift Unit and Complete Gearbox
44
Disassembly of Parts from Crankcases
46
Right Crankcase Half
46
Left Crankcase Half
48
Engine Checks and Assembly
49
Crankcase Half
49
Application of Right Crankcase Half Parts
50
Application of Left Crankcase Half Parts
52
Connecting Rod and Engine Shaft Check
53
Slew Bearing Removal and Refitting
53
Assembly of Complete Crankshaft
55
Gear Unit: Checks and Reassembly
56
Gearbox Unit Check
56
Primary Unit Assembly
57
Secondary Unit Assembly
58
Checking the Forks, Fork Pins and Desmodromic Device
59
Gearbox and Internal Gearshift Assembly
61
Counterweight Support Shaft
64
Closing the Engine Crankcase
65
External Gearshift
66
Checking the Complete Drive Shaft
66
External Gearshift Assembly
68
Kickstarter Device - Optional
69
Checking the Kickstart Shaft Unit and Assembly
69
Assembly of Kickstarter Device - Optional
70
Counterweight, Primary Gear and Clutch Unit
72
Inspection of Counterweight and Primary Gear
72
Application of Primary Gear and Counterweight
72
Checking the Clutch Case, Roller Bearing and Internal Centre Bearing
74
Checking the Clutch Discs
75
Checking the Clutch Drum and Cap
76
Checking the Thrust Bearing Device
76
Clutch Unit Assembly
77
Coolant Liquid Pump and Centrifugal Unit
81
Check of Pump Unit and Disassembly, Centrifugal Unit and Idler Unit
82
Centrifugal Unit Assembly
83
Pump Unit Assembly
86
Assembly of Complete Clutch Cover and Pump Unit
86
Electric Ignition Unit
89
3.10.1 Bendix Coupling Checks
89
Ignition Unit Coupling to Engine
89
Ignition System
90
3.11.1 Ignition System Check
91
Coupling of Ignition System to Crankcase
91
Thermal Unit
94
Checking the Piston and Elastic Bands
94
3.12.2 Cylinder Check
95
Piston Cylinder Coupling Play
96
Checks and Exhaust Valve Unit Disassembly
96
3.12.5 Exhaust Valve
98
Unit Assembly
98
Piston, Pin Bolt, Elastic Bands and Cylinder Assembly
100
Check of Crankcase/Cylinder Gasket Thickness
102
3.12.8 Head Application
103
3.12.9 Exhaust Valve
104
Adjustment
104
Check of Intake Unit and Assembly
108
Insertion of Clutch Rod and Pinion Spacer
110
Engine Reassembly in the Vehicle
111
Table of Engine Components Tightening Torques
121
Table of Frame/Engine Tightening Torques
123
Table of Superstructure Tightening Torques
123
Recommended Engine Maintenance
124
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