Excessive Oil Consumption/Exhaust Smoke; Engine Tends To Cut-Off At Full Throttle; Engine Tends To Cut-Off At Idle; Excessive Exhaust Noise - Gilera Runner RST 50 SP Service Station Manual

Runner RST 50 SP
Possible Cause
Intake joint cracked or with a bad seal
Purifier-carburettor fitting damaged

Excessive oil consumption/Exhaust smoke

EXCESSIVE OIL CONSUMPTION/SMOKEY EXHAUST
Possible Cause
Excess of encrustations in the combustion chamber

Engine tends to cut-off at full throttle

Possible Cause
Maximum nozzle dirty - lean mixture
Dirty carburettor
Water in the carburettor
Air filter dirty
Defective floating valve
Tank breather hole obstructed

Engine tends to cut-off at idle

Possible Cause
Minimum nozzle dirty
Starter that stays open
Reed valve does not close
Wrong idling adjustment
Spark plug defective or faulty

Excessive exhaust noise

Possible Cause
Secondary metal air pipe deteriorated
Good condition of the missing secondary air circuit components
High fuel consumption
Possible Cause
Air filter blocked or dirty.
Bear in mind that many problems engines have, derive from
Replace the intake joint and check its tightness on the crank-
ENGINE STOP FULL THROTTLE
Wash the nozzle with solvent and dry with compressed air
Wash the carburettor with solvent and dry with compressed air
Empty the tank through the appropriate bleed nipple.
Check the proper sliding of the float and the functioning of the
ENGINE STOP IDLING
Wash the nozzle with solvent and dry with compressed air
Check: electric wiring, circuit continuity, mechanical sliding and
Correctly adjust the engine idling and check the level of the
Replace the spark plug with one with the specified degree and
INCREASED NOISINESS
Check the seal of the piping on the crankcase and on the hous-
ing, check the piping between the housing and the muffler.
Check the individual components and the piping, check the
precision of the fitting. Replace the damaged components
HIGH FUEL CONSUMPTION
Troubleshooting
Operation
the use of the wrong spark plug
case and on the carburettor
Replace
Operation
Remove the encrustations
Operation
Clean or replace
valve
Restore the proper tank aeration
Operation
power supply
Check / replace the reed pack
C.O.
check the plug gap
Operation
Operation
Clean according to the procedure
TROUBL - 39