Possible Cause
Operation
spark plug and the spark plug grounded but away from its hole.
Refit a dry spark plug and start the vehicle.
Altered fuel characteristics
Drain off the fuel no longer up to standard; then, refill
Faulty spark plug
Remove the encrustation, restore the plug gap or replace being
sure to use the types of spark plug recommended at all times.
Bear in mind that many problems engines have, derive from
the use of the wrong spark plug
Intake joint cracked or with a bad seal
Replace intake joint and check for correct sealing on the head
Purifier-carburettor fitting damaged
Replace
Excessive oil consumption/Exhaust smoke
EXCESSIVE OIL CONSUMPTION/SMOKEY EXHAUST
Possible Cause
Operation
Excess of encrustations in the combustion chamber
Remove the encrustations
Engine tends to cut-off at full throttle
ENGINE STOP FULL THROTTLE
Possible Cause
Operation
Maximum nozzle dirty - lean mixture
Wash the nozzle with solvent and dry with compressed air
Dirty carburettor
Wash the carburettor with solvent and dry with compressed air
Water in the carburettor
Empty the tank through the appropriate bleed nipple.
Air filter dirty
Clean or replace
Defective floating valve
Check the proper sliding of the float and the functioning of the
valve
Tank breather hole obstructed
Restore the proper tank aeration
Engine tends to cut-off at idle
ENGINE STOP IDLING
Possible Cause
Operation
Minimum nozzle dirty
Wash the nozzle with solvent and dry with compressed air
Starter that stays open
Check: electric wiring, circuit continuity, mechanical sliding and
power supply
Reed valve does not close
Check / replace the reed pack
Wrong idling adjustment
Adequately adjust the engine idle speed
Spark plug defective or faulty
Replace the spark plug with one with the specified degree and
check the plug gap
Excessive exhaust noise
INCREASED NOISINESS
Possible Cause
Operation
Secondary metal air pipe deteriorated
Check there are no leaks on the hoses on the crankcase and
the housing, check that there is a cap with filter and it is correctly
fitted to the transmission cover
Good condition of the missing secondary air circuit components
Check the individual components and the piping, check the
precision of the fitting. Replace the damaged components
Troubleshooting
Vespa S 50 2T
TROUBL - 40
Содержание 664787
Страница 1: ...SERVICE STATION MANUAL 664787 664795 IT EN FR DE ES PT NL EL Vespa S 50 2T ...
Страница 4: ......
Страница 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Страница 16: ...INDEX OF TOPICS TOOLING TOOL ...
Страница 27: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Страница 38: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Страница 44: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Страница 48: ...Conceptual diagrams Ignition Electrical system Vespa S 50 2T ELE SYS 48 ...
Страница 64: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Страница 66: ...INDEX OF TOPICS ENGINE ENG ...
Страница 97: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Страница 117: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Страница 126: ...INDEX OF TOPICS CHASSIS CHAS ...
Страница 135: ... Undo the two screws indicated Remove the front central cover sliding it up wards Vespa S 50 2T Chassis CHAS 135 ...
Страница 136: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Страница 140: ...INDEX OF TOPICS TIME TIME ...
Страница 141: ...Engine ENGINE Code Action Duration 1 001001 engine from frame removal and re fitting Vespa S 50 2T Time TIME 141 ...
Страница 142: ...Crankcase CRANKCASE Code Action Duration 1 001133 Engine crankcase Replacement Time Vespa S 50 2T TIME 142 ...
Страница 169: ...Seat SADDLE Code Action Duration 1 004003 Saddle Replacement Vespa S 50 2T Time TIME 169 ...