Beta Urban 125 Service Manual page 73

6
PROBLEM
Engine does not start
Engine misfires
Engine knocks
Engine overheats and
loses power
Front braking poor
Rear braking poor
GB
CAUSE
- Fuel system clogged (fuel lines,
fuel tank, fuel cock).
- Air filter dirty.
- No current supplied to spark
plug.
- Engine flooded.
- Spark gap wrongly adjusted.
- Spark plug dirty.
- Spark advance excessive.
- Carbon formation in cylinder or
on spark plug.
- Silencer partly clogged.
- Exhaust port clogged.
- Ignition delayed.
- Brake pads worn.
- Air or humidity in the hydraulic
circuit.
- Brake pads worn.
- Air or humidity in the hydraulic
circuit.
72
REMEDY
Clean the system.
Proceed as described on page 48.
Clean or replace the spark plug. If the
problem persists, contact a
BETAMOTOR dealer.
Open the throttle wide and try starting
the engine for a few moments. If this
does not solve the problem, remove the
spark plug and dry it.
Restore the spark gap.
Clean or replace the spark plug.
Check the ignition timing.
Contact a BETAMOTOR dealer.
Contact a BETAMOTOR dealer.
Contact a BETAMOTOR dealer.
Check the timing.
Follow the procedure described on
page 66.
Follow the procedure described on
page 46.
Follow the procedure described on
page 66.
Follow the procedure described on
page 46.