Removing the oil sump
- Remove the oil filler plug, the transmission cover,
the complete drive pulley assembly with belt and
the sprocket wheel, as described in the Transmis-
sion chapter.
- Drain the oil from the sump as described above.
- Remove the 7 screws indicated in the figure and
the 2 rear brake transmission fixing brackets.
- Remove the spring, the by-pass piston and the
gasket shown in the second image.
Inspecting the by-pass valve
- Check the unloaded spring length.
- Check that the small piston is not scored.
- Ensure that it slides freely on the crankcase and
that it guarantees a good seal.
- If not, eliminate any impurities or replace defec-
tive parts.
Characteristic
By-pass check up: Standard length
54.2 mm
Engine
Vespa LX 125 - 150 i.e.
ENG - 144
Summary of Contents for LX Series
Page 4: ......
Page 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 21: ...INDEX OF TOPICS TOOLING TOOL ...
Page 33: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 44: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Page 48: ...Troubleshooting Vespa LX 125 150 i e TROUBL 48 ...
Page 49: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 52: ...Components arrangement Electrical system Vespa LX 125 150 i e ELE SYS 52 ...
Page 86: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 90: ...Engine from vehicle Vespa LX 125 150 i e ENG VE 90 ...
Page 91: ...INDEX OF TOPICS ENGINE ENG ...
Page 137: ...Conceptual diagrams Vespa LX 125 150 i e Engine ENG 137 ...
Page 146: ...INDEX OF TOPICS INJECTION INJEC ...
Page 164: ...Injection Vespa LX 125 150 i e INJEC 164 ...
Page 171: ...Vespa LX 125 150 i e Injection INJEC 171 ...
Page 185: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 205: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 214: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 222: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Page 226: ...INDEX OF TOPICS TIME TIME ...
Page 272: ...T Tank 256 Transmission 9 46 92 103 113 241 Turn indicators 65 Tyres 13 V Vehicle 8 87 88 ...