This section makes it possible to find the solutions to use in troubleshooting.
For each breakdown, a list of the possible causes and respective interventions is given.
Engine
Excessive oil consumption/Exhaust smoke
EXCESSIVE CONSUMPTION
Possible Cause
Operation
Wrong valve adjustment
Adjust the valve clearance properly
Overheated valves
Remove the head and the valves, grind or replace
the valves
Misshapen/worn valve seats
Replace the head assembly
Worn cylinder, Worn or broken piston rings
Replace the piston cylinder assembly or piston
rings
Worn or broken piston rings or piston rings that
have not been fitted properly
Replace the piston cylinder unit or just the piston
rings
Oil leaks from the couplings or from the gaskets Check and replace the gaskets or restore the cou-
pling seal
Worn valve oil guard
Replace the valve oil guard
Worn valve guides
Check and replace the head unit if required
Insufficient lubrication pressure
POOR LUBRICATION PRESSURE
Possible Cause
Operation
By-Pass remains open
Check the By-Pass and replace if required. Care-
fully clean the By-Pass area.
Oil pump with excessive clearance
Perform the dimensional checks on the oil pump
components
Oil filter too dirty
Replace the cartridge filter
Oil level too low
Restore the level using the recommended oil type
(Selenia HI Scooter 4 Tech)
Transmission and brakes
Clutch grabbing or performing inadequately
IRREGULAR CLUTCH PERFORMANCE OR SLIPPAGE
Possible Cause
Operation
Faulty clutch
Check that there is no grease on the masses.
Check that the clutch mass contact surface with
the casing is mainly in the centre with equivalent
characteristics on the three masses. Check that
the clutch casing is not scored or worn in an anom-
alous way
Troubleshooting
Vespa GTS 250 I.E.
TROUBL - 2
Summary of Contents for Vespa GTS 250
Page 4: ...4 ...
Page 6: ...Warnings 78 PROGRAMMED MAINTENANCE 81 Scheduled maintenance table 82 6 ...
Page 7: ...Vespa GTS 250 Chap 01 Vehicle 7 ...
Page 9: ...01_02 9 1 Vehicle ...
Page 23: ...23 1 Vehicle ...
Page 24: ...24 1 Vehicle ...
Page 25: ...Vespa GTS 250 Chap 02 Use 25 ...
Page 28: ...02_02 28 2 Use ...
Page 38: ...38 2 Use ...
Page 39: ...Vespa GTS 250 Chap 03 Maintenance 39 ...
Page 57: ...Protected circuits Front and rear side lights dashboard lighting 03_20 03_21 57 3 Maintenance ...
Page 58: ...03_22 03_23 03_24 58 3 Maintenance ...
Page 70: ...70 3 Maintenance ...
Page 71: ...Vespa GTS 250 Chap 04 Technical data 71 ...
Page 75: ...04_01 75 4 Technical data ...
Page 77: ...Vespa GTS 250 Chap 05 Spare parts and accessories 77 ...
Page 80: ...80 5 Spare parts and accessories ...
Page 81: ...Vespa GTS 250 Chap 06 Programmed maintenance 81 ...
Page 87: ...WORKSHOP MANUAL 633577 Vespa GTS 250 I E ...
Page 90: ......
Page 92: ......
Page 93: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 105: ...INDEX OF TOPICS TOOLING TOOL ...
Page 118: ...Tooling Vespa GTS 250 I E TOOL 14 ...
Page 119: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 133: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Page 137: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 142: ...Front side 1 Saddle opening switch 2 Wirings Electrical system Vespa GTS 250 I E ELE SYS 6 ...
Page 176: ... Refit the battery cover Connectors Electrical system Vespa GTS 250 I E ELE SYS 40 ...
Page 177: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 184: ...Engine from vehicle Vespa GTS 250 I E ENG VE 8 ...
Page 185: ...INDEX OF TOPICS ENGINE ENG ...
Page 242: ...Engine Vespa GTS 250 I E ENG 58 ...
Page 250: ...Engine Vespa GTS 250 I E ENG 66 ...
Page 251: ...INDEX OF TOPICS INJECTION INJEC ...
Page 254: ...Injection Vespa GTS 250 I E INJEC 4 ...
Page 270: ... REMOTE CONTROLS CONTROL UNIT FUSES ETC Injection Vespa GTS 250 I E INJEC 20 ...
Page 284: ...Components location Injection Vespa GTS 250 I E INJEC 34 ...
Page 290: ...Injection Vespa GTS 250 I E INJEC 40 ...
Page 304: ...Injection Vespa GTS 250 I E INJEC 54 ...
Page 305: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 326: ...Suspensions Vespa GTS 250 I E SUSP 22 ...
Page 327: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 343: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Page 346: ...Cooling system Vespa GTS 250 I E COOL SYS 4 ...
Page 347: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 359: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Page 363: ...INDEX OF TOPICS TIME TIME ...
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