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PIAGGIO
Scooter
MSS X9 EVOLUTION 250
Page 152
PIAGGIO MSS X9 EVOLUTION 250 - Page 152
262 pages
Manual
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Unscrew the bayonet joint 1/8 of a turn, remove it,
take out the spring and vacuum valve plunger
Remove the 4 screws shown in the figure.
Remove the tank with the intake pump, its control
and gasket.
Engine
MSS X9 Evolution 250
ENG - 152
151
153
Table of Contents
Main Page
Index of Topics
5
Safety Rules
7
Maintenance Rules
7
Vehicle Identification
8
Dimensions and Mass
8
Dimensions and Weight
8
Capacities
10
Frame and Suspensions
10
Gas Control Transmission Fixing
10
Electrical System
10
Brakes
11
Wheels and Tyres
11
Secondary Air
11
Carburettor
12
250Cc Version
12
Walbro
13
Tightening Torques
13
Front Suspension
13
Crankcase and Crankshaft
14
Assembly Clearances
15
Piston Rings
16
Crankcase - Crankshaft - Connecting Rod
17
Slot Packing System
18
Products
18
Maintenance Chart
32
At 1000 Km or 4 Months
32
At 6000 Km or 12 Months
32
At 12000 Km or 24 Months and at 60000 Km
32
At 18000 Km and at 54000 Km
33
At 24000 Km and at 48000 Km
33
At 30000 Km, at 42000 Km and at 66000 Km
33
At 36000 Km
34
At 72000 Km
34
Every 2 Years
34
Every 3,000 Km
35
Checking the Spark Advance
35
Spark Advance Variation
36
Spark Plug
37
Hub Oil
38
Hub Oil Replacement
39
Air Filter
39
Engine Oil
39
Oil Top up
40
Checking the Ignition Timing
41
Checking the Valve Clearance
41
Cooling System
41
Level Check
42
Braking System
43
CO Check
44
SAS Filters Inspection and Cleaning
45
Troubleshooting
46
Engine Poor Performance
47
Rear Wheel Spins at Idle
47
Starting Difficulties
47
Excessive Oil Consumption/Exhaust Smoke
48
Insufficient Lubrication Pressure
48
Engine Tends to Cut-Off at Full Throttle
48
Engine Tends to Cut-Off at Idle
49
Excessive Exhaust Noise
49
High Fuel Consumption
49
SAS Malfunctions
49
Troubleshooting
49
Clutch Grabbing or Performing Inadequately
50
Insufficient Braking
50
Brakes Overheating
50
Battery
50
Turn Signal Lights Malfunction
51
Electrical System
52
Electric System Diagram
53
Conceptual Diagrams
54
Wiring Colour Chart
54
Ignition
55
Headlights and Automatic Starter Section
56
Battery Recharge and Starting
57
Level Indicators and Enable Signals Section
58
Turn Signal Lights
59
Checks and Inspections
60
Immobiliser
60
Virgin Circuit
61
Diagnostic Codes
62
Diagnostic Code - 2 Flashes
62
Diagnostic Code - 3 Flashes
63
Ignition Circuit
63
No Spark Plug
64
HV Primary Coil Check
64
Electric Characteristic
64
HV Coil Secondary Check
65
Stator Check
66
Voltage Regulator Check
67
Recharge System Voltage Check
67
Choke Inspection
68
Lights List
68
Fuses
69
Data Check Function
72
Sealed Battery
72
Dry-Charge Battery
73
Instructions for the Battery Refresh after Open-Circuit Storage
73
Connectors
74
Dashboard
75
12-Way Instrument Connector
75
8-Way Instrument Connector
75
16-Way Instrument Connector
75
Engine from Vehicle
77
Removal of the Engine from the Vehicle
78
Engine
80
Automatic Transmission
81
Transmission Cover
81
Air Duct
81
Removing the Driven Pulley Shaft Bearing
82
Refitting the Driven Pulley Shaft Bearing
82
Baffle Roller
82
Plastic Roller
83
Removing the Driven Pulley
83
Inspecting the Clutch Drum
84
Removing the Clutch
85
Inspecting the Clutch
85
Pin Retaining Collar
86
Removing the Driven Half-Pulley Bearing
86
Inspecting the Driven Fixed Half-Pulley
87
Inspecting the Driven Sliding Half-Pulley
88
Refitting the Driven Half-Pulley Bearing
88
Movable Driven Half-Pulley Dimensions
88
Refitting the Driven Pulley
89
Inspecting the Clutch Spring
90
Refitting the Clutch
90
Drive-Belt
92
Removing the Driving Pulley
92
Inspecting the Rollers Case
93
Refitting the Driving Pulley
94
Refitting the Transmission Cover
95
End Gear
95
Removing the Hub Cover
95
Removing the Wheel Axle
96
Removing the Hub Bearings
96
Removing the Wheel Axle Bearings
97
Inspecting the Hub Shaft
98
Inspecting the Hub Cover
98
Refitting the Wheel Axle Bearing
98
Refitting the Hub Cover Bearings
99
Refitting the Hub Bearings
100
Refitting the Hub Cover
100
Flywheel Cover
101
Removing the Stator
102
Refitting the Stator
102
Refitting the Flywheel Cover
102
Flywheel and Starting
103
Removing the Starter Motor
103
Removing the Flywheel Magneto
103
Refitting the Free Wheel
104
Refitting the Flywheel Magneto
105
Refitting the Starter Motor
106
Cylinder Assy. and Timing System
106
Removing the Intake Manifold
106
Removing the Rocker-Arms Cover
107
Removing the Timing System Drive
107
Removing the Cam Shaft
109
Removing the Cylinder Head
110
Removing the Valves
110
Removing the Cylinder - Piston Assy.
110
Inspecting the Small End
111
Inspecting the Wrist Pin
112
Inspecting the Piston
112
Inspecting the Cylinder
113
Inspecting the Piston Rings
114
Removing the Piston
114
Choosing the Gasket
115
Refitting the Piston Rings
117
Refitting the Cylinder
117
Fitting the Sealing Rings
117
Inspecting the Cylinder Head
118
Inspecting the Timing System Components
119
Inspecting the Valve Sealings
119
Inspecting the Valve Housings
120
Inspecting the Valves
120
Inspecting the Springs and Half-Cones
122
Refitting the Valves
123
Inspecting the Cam Shaft
123
Refitting the Head and Timing System Components
125
Refitting the Rocker-Arms Cover
128
Refitting the Intake Manifold
128
Crankcase - Crankshaft
128
Splitting the Crankcase Halves
129
Inspecting the Crankshaft Alignment
131
Inspecting the Crankcase Halves
132
Inspecting the Crankshaft Plain Bearings
133
Refitting the Crankcase Halves
135
Lubrication
136
Crankshaft Oil Seals Removal
136
Crankshaft Oil Seals Refitting
137
Oil Pump Removal
138
Oil Pump Inspection
139
Oil Pump Refitting
140
Removing the Oil Sump
141
Inspecting the By-Pass Valve
141
Refitting the Oil Sump
142
SAS Valve
142
Inspecting the One-Way Valve
142
Inspecting the Cut-Off
143
Fuel Supply
144
Removing the Carburettor
144
Kehin
144
Inspecting the Valve and Needle
163
Inspecting the Automatic Choke Device
166
Adjusting the Idle
169
Suspensions
172
Removing the Front Wheel
173
Handlebar Removal
173
Handlebar Refitting
174
Front Fork Removal
174
Front Fork Overhaul
174
Front Fork Refitting
176
Steering Bearing
176
Removing the Rear Wheel
179
Swing-Arm Removal
179
Shock Absorbers
179
Shock Absorbers Removal
180
Shock Absorbers Refitting
180
Centre-Stand
180
Interventions Rules
183
Rear Brake Calliper
183
Front Brake Calliper
184
Front Brake Disc Removal
186
Front Brake Pads Removal
187
Rear Brake Pads
187
Fill Front
188
Brake Fluid Level Check
189
Front Brake Pump
189
Cooling System Circuit Diagram
193
Water Pump - Overhaul
194
Cooling Plant
194
Thermostat Removal
201
Thermostat Check
202
Thermostat Refitting
202
Chassis
204
Seat
205
Rear Handlebar Cover
205
Front Handlebar Cover
205
Headlight Assy.
206
Frame Central Cover
206
Taillight Assy.
207
Footrest
207
Side Fairings
208
License Plate Holder
208
Helmet Bay
209
Fuel Tank
209
Rear Central Cover
210
Radiator Fan
211
Expansion Tank
211
Top-Case
211
Handles and Top Side Fairings
212
Digital Panel Support
212
Front Central Cover
213
Flyscreen
213
Pre-Delivery
215
Aesthetic Inspection
216
Tightening Torques Inspection
216
Levels Check
217
Road Test
217
Static Test
218
Functional Inspection
218
Time
219
Crankcase
220
Crankshaft
221
Cylinder Assy.
222
Cylinder Head Assy.
222
Rocker Arms Support Assy.
223
Cylinder Head Cover
224
Oil Filter
225
Driven Pulley
226
Oil Pump
226
Final Gear Assy.
227
Driving Pulley
228
Starter Motor
229
Flywheel Magneto
230
Belt Cooling Duct
230
Exhaust Pipe
232
Air Cleaner
233
Frame
234
Legshield Spoiler
236
Rear Cover
237
Mudguard
238
Radiator
241
Rear Shock-Absorber
242
Handlebar Covers
242
Handlebar Components
243
Swing-Arm
244
Brake Hoses
245
Locks
247
Front Wheel
248
Grease Tone Wheel or Drive
249
Rear Wheel
250
Electric Devices
250
Brake Callipers
255
Fuel Tank Filler Flap
256
Footrests
257
Steering Column
257
Rear Side Fairings
259
Windscreen
260
Secondary Air Box
260
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