PIAGGIO X9 Service Station Manual page 97

Troubleshooting
SYMTOM
Poor performance
Rear wheel turns when
engine is idling
Starting problems
3 - 44 1st Update to part no. 594599 X9 125-180 cc 4T 4V
Primera actualización dib. 594599 X9 125-180 cc 4T 4V
s
1 Atualização Des. 594599 X9 125-180 CC 4T 4V
POSSIBLE CAUSE
Carburettor dirty. Fuel pump or one-way valve
faulty.
Excess carbon deposits in combustion cham-
ber
Timing failure or timing system parts worn
Silencer blocked
Air filter clogged or dirty
Automatic choke faulty
Clutch slippage
Automatic transmission faulty
Drive belt worn
Poor compression: rings, cylinder and valves
worn
Engine oil level exceeds MAX mark
Idle speed set too high
Faulty clutch
Battery is down
Carburettor dirty, fuel pump or vacuum cock
faulty
Spark plug faulty or spark advance incorrect
Air filter clogged or dirty
Automatic choke faulty
Engine flooded
Incorrect valves seal or wrong valves adjust-
ment
Starting speed too low or starting motor and
system faulty
Modified fuel characteristics
X9 125-180 CC 4T4V
INTERVENTION
Remove, wash with solvent and dry with com-
pressed air, or replace
Decarbonize cylinder, piston, head and valves.
Reset timing phase or replace any worn parts.
Renew.
Remove the sponge, wash it in water and
shampoo, and then soak it in a 50 percent
mixture of petrol and a specific oil (Selenia Air
Filter Oil). Squeeze the sponge between the
hands without twisting, allow it to drip and then
replace it.
Check the mechanical sliding and the electrical
connection and ensure that power is supplied.
If necessary replace.
Check and if necessary replace the clutch as-
sembly and/or the clutch bell housing
Check the rollers and the sliding of the pulleys.
Replace any faulty parts and lubricate the mov-
able driven pulley guide with Montblanc Molyb-
denum Grease.
Renew.
Replace worn parts.
Find out the cause and adjust the oil level.
Adjust the slow running and, if necessary, the
CO concentration.
Check the clutch springs/weights
Check the battery charge. If the battery shows
any signs of sulphation, replace it with a new
one (refer to page 4 for installing instructions).
Remove, wash with solvent and dry with com-
pressed air, or replace
Replace the spark plug or check the ignition
circuit components.
Remove the sponge, wash it in water and
shampoo, and then soak it in a 50 percent
mixture of petrol and a specific oil (Selenia Air
Filter Oil). Squeeze the sponge between the
hands without twisting, allow it to drip and then
replace it.
Check the mechanical sliding and the electrical
connection and ensure that power is supplied.
If necessary replace.
Open the throttle wide and try to start the
engine. If it does not start, remove the spark
plug, dry it and, before replacing it, crank the
engine to expel the excess fuel, taking care to
keep the spark plug cap connected to the spark
plug and the spark plug to earth. If the fuel has
run out, refuel and then start the engine.
Check head and/or adjust clearance.
Check starter motor, starting system and torque
limiter (180 cc engine)
Drain worn fuel and refuel