Derbi GP1 50 cc, Руководство по ремонту

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CAUSES POSSIBLE
WORK
Excessive carbon deposits on cylinder ports
and in combustion chamber Decoke
EXCESSIVE OIL CONSUMPTION/EXHAUST SMOKE
CAUSES POSSIBLE
WORK
Maximum jet dirty - lean carburetion
Fuel cock failure
Water in the carburettor
Float valve faulty
Wash with solvent and dry with compressed air.
Check that the fuel comes through the feed pipe when
the engine is started, with the throttle closed; if not,
replace the vacuum cock.
Empty the basin by the special drain.
Check float sliding and needle valve operation.
ENGINE TENDS TO CUT-OFF AT FULL THROTTLE
Float valve defective Check float and needle sliding.
Fuel vent pipe colgged Resorte the proper tank aeration.
CAUSES POSSIBLE
WORK
Idle nozzle dirty
The choke stays open
The reed valve does not close
Slow running incorrectly tuned up
Wash with solvent and dry with compressed air
Check: electrical connections, circuit continuity, me-
chanical sliding and power supply
Check / replace the reed pack
Tune up slow running and check C.O. level
ENGINE TENDS TO CUT-OFF AT IDLE
Spark plug faulty Replace spark plug with an equivalent part having the
prescribed heat grade. Check electrodes gap
E
NGINE STOPS AT FULL THROTTLE
E
NGINE STOPS AT IDLE