Gilera DNA 50 - Excessive Oil Consumption;Exhaust Smoke; Engine Tends to Cut-Off at Full Throttle; Engine Tends to Cut-Off at Idle; Excessive Exhaust Noise

Possible Cause Operation
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 the intake joint and check its tightness on the crank-
case and on the carburettor
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 Correctly adjust the engine idling and check the level of the
C.O.
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 the seal of the piping on the crankcase and on the hous-
ing, check the piping between the housing and the muffler.
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
High fuel consumption
HIGH FUEL CONSUMPTION
Possible Cause
Operation
Air filter blocked or dirty. Clean according to the procedure
DNA 50 Troubleshooting
TROUBL - 37