Insufficient braking
INEFFICIENT BRAKING SYSTEM
Possible Cause
Operation
Inefficient braking system
Check the pad wear (1.5 min). Check that the
brake discs are not worn, scored or warped. Check
the correct level of fluid in the pumps and replace
brake fluid if necessary. Check there is no air in
the circuits; if necessary, bleed the air. Check that
the front brake calliper moves in axis with the disc.
Fluid leakage in hydraulic braking system
Failing elastic fittings, plunger or brake pump
seals, replace
Brake disc slack or distorted
Check the brake disc screws are locked; measure
the axial shift of the disc with a dial gauge and with
wheel mounted on the scooter.
Brakes overheating
BRAKES OVERHEATING
Possible Cause
Operation
Defective sliding of pistons
Check calliper and replace any damaged part.
Brake disc slack or distorted
Check the brake disc screws are locked; use a dial
gauge and a wheel mounted on the vehicle to
measure the axial shift of the disc.
Clogged compensation holes on the pump
Clean carefully and blast with compressed air
Re-inflated or glued rubber gaskets
Replace gaskets.
Steering and suspensions
Heavy steering
STEERING HARDENING
Possible Cause
Operation
Steering hardening
Check the tightening of the top and bottom ring
nuts. If irregularities continue in turning the steer-
ing even after making the above adjustments,
check the seats in which the ball bearings rotate:
if they are recessed or if the balls are squashed,
replace them.
Excessive steering play
EXCESSIVE STEERING CLEARANCE
Possible Cause
Operation
Torque not conforming
Check the tightening of the top and bottom ring
nuts. If irregularities continue in turning the steer-
ing even after making the above adjustments,
check the seats in which the ball bearings rotate:
Vespa GTS 250 I.E.
Troubleshooting
TROUBL - 3
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 ...
Page 408: ... ...
Page 409: ... ZAPM45100 2 ...
Page 410: ... ZAPM45100 3 ...
Page 411: ... 0 1 2 34 0 2 5 6 2 5 3780 9 65 5 3 0 5 2 3 8 5 1 8 0 2 1 5 ZAPM45100 4 ...
Page 412: ... ZAPM45100 5 ...
Page 424: ... 1 5 7 5 2 5 2 2 5 2 6 2 6 2 A 4 5 A 5 6 52 6 2 3 5 A 5 8 5 A 1 6 ZAPM45100 17 ...
Page 425: ... 5 A 6 5 A 5 5 1 6 5 6 7 2 2 5 25 2 52 5 1 2 1 2 A 5 2 5 4 6 2 6 2 ZAPM45100 18 ...
Page 426: ... 5 22 B 2 5 5 4 5 2 5 5 0 5 2 0 7 5 2 5 2 1 A 52 2 6 2 5 4 25 A 5 6 5 2 ZAPM45100 19 ...
Page 427: ... 3 A 5 5 8 C 6 1 6 16 5 2 6 1 5 A 5 16 5 2 7 5 5 55 5 4 5 A 1 55 50 ZAPM45100 20 ...
Page 428: ... 3 8 6 2 2 1 2 7 5 A 5 1 7 2 5 2 7 7 5 2 5 1 1 5 ZAPM45100 21 ...
Page 429: ... 5 0 2 5 1 26 2 5 1 5 1 6 2 5 6 50 5 2 4 5 5 5 5 4 2 5 2 6 622 4 5 2 65 1 ZAPM45100 22 ...
Page 430: ... 4 7 5 65 1 4 2 25 2 22 5 5 4 2 1 16 2 5 25 25 2 6 4 4 5 ZAPM45100 23 ...
Page 431: ... 5 2 D 2 65 5 1 2 ZAPM45100 1 24 ...
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Page 437: ... 5 2 D 2 65 5 1 2 ZAPM45100 6 2 A 30 ...
Page 438: ... 5 2 D 2 65 5 1 2 0 0 4 5 A 5 6 52 6 2 ZAPM45100 31 ...
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Page 461: ... 5 2 D 2 65 5 1 2 678 0 9 0 ZAPM45100 7 5 2 54 ...
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Page 475: ... 5 2 D 2 65 5 1 2 678 9 678 99 678 69 678 6 678 678 9 678 0 9 678 0 9 1 ZAPM45100 7 5 68 ...
Page 476: ... 5 2 D 2 65 5 1 2 5 55 5 ZAPM45100 69 ...
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Page 493: ... 5 2 D 2 65 5 1 2 ZAPM45100 5 0 2 5 1 26 2 5 1 5 1 6 2 86 ...
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