- Check that the diaphragm is not worn or has
hardened.
If it does, replace it.
- Refit the tapered pin on the vacuum valve.
- Make sure the spring is in the correct position on
the plunger and inserted in its housing.
- Assemble the coupling by rotating it 1/8 of a turn.
- Reassemble the vacuum gas valve on the car-
burettor body being careful that the tapered pin is
inserted into the sprayer.
- Time the vacuum valve rotation inserting the di-
aphragm tab in its place.
When the diaphragm is correctly assembled to the
valve, the main vacuum supply hole is positioned
axially with the diffuser, on the throttle valve side.
- Refit the spring on the valve.
- Refit the vacuum chamber cover matching the
reference mark with the orientation of the dia-
phragm.
- Tighten the screws to the prescribed torque.
- Check the cut-off valve correct functioning. -
Check that the diaphragm is not worn or has hard-
ened. Check the free length of the spring.
Characteristic
Walbro: Standard length of cut-off spring
24 mm
- Reassemble the diaphragm and the metal pin placed on the valve.
- Reassemble the spring and the cover. The vacuum intake should be facing upwards.
Inspecting the automatic choke device
Engine
MSS X9 Evolution 250
ENG - 166
Summary of Contents for MSS X9 EVOLUTION 250
Page 1: ...WORKSHOP MANUAL 618153 MSS X9 Evolution 250 ...
Page 4: ......
Page 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 19: ...INDEX OF TOPICS TOOLING TOOL ...
Page 31: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 46: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Page 52: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 77: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 80: ...INDEX OF TOPICS ENGINE ENG ...
Page 116: ...Engine MSS X9 Evolution 250 ENG 116 ...
Page 148: ... Remove the maximum nozzle Remove diffuser Engine MSS X9 Evolution 250 ENG 148 ...
Page 172: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 181: ...stand retaining bolt 20 25 MSS X9 Evolution 250 Suspensions SUSP 181 ...
Page 182: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 191: ...MSS X9 Evolution 250 Braking system BRAK SYS 191 ...
Page 192: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Page 193: ...Circuit diagram MSS X9 Evolution 250 Cooling system COOL SYS 193 ...
Page 203: ...Thermostat cover screws 3 4 MSS X9 Evolution 250 Cooling system COOL SYS 203 ...
Page 204: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 215: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Page 219: ...INDEX OF TOPICS TIME TIME ...