Probable Cause And Troubleshooting - PIAGGIO Ape Workshop Manual

APE TM Benzina

Probable cause and troubleshooting

Possible Cause
Insufficient idle stroke
Weak return spring
Worn or burned driven disc gasket
Insufficient oil in the differential transmission or unsuitable oil
Possible Cause
Gearbox housing worn
Badly adjusted control cable
Transmission gears or spiders not properly assembled or worn
Possible Cause
Worn or leaking shock absorbers
Flexible buffers of the swinging arms worn
Insufficient lubrication of the hubs
Recommended products
AGIP GREASE PV 2 Multipurpose grease
NLGI 2 specifications; ISO-LXBIB2
SECONDARY AIR TUBE JOINT FAILURE ON THE SILENCER - APE TM KAT
Possible Cause
Secondary air blade locking
Secondary air filter clogging
Clogging of the secondary air joint on the silencer
Engine
Possible Cause
Idle speed too low
Dirt or water in the mixture or in the ducts
Inefficient spark plug
Cock obstruction
H.V. cable or spark plug hood damaged
Fuel tank cap breather obstruction (defective fuel system)
Possible Cause
Excessive clearance of the main bearings
Big end failure
Crankshaft unbalanced
Piston pin worn
Possible Cause
Excessive clearance between the piston and cylinder
Excessive clearance of the roller pin-connecting rod small end
or piston pin
CLUTCH SLIPPAGE
SPONTANEOUS GEARS DISENGAGEMENT
NOISE
THE ENGINE STOPS
CRANKSHAFT KNOCKS
RINGING OF THE PISTON
Operation
Adjust the stroke.
Replace.
Replace the disc.
Restore the oil level or replace.
Operation
Verify and replace if necessary.
Record.
Review.
Operation
Replace.
Replace.
Remove the hubs and fill the appropriate chamber with special
grease.
Operation
Replace.
Clean the filter and the box.
Descale the joint taking care to not let the residues fall into the
silencer.
Operation
Work on the appropriate adjuster screw del of the carburettor.
Clean thoroughly.
Clean and adjust the gap between the electrodes or replace.
Clean.
Check or replace.
Clean properly.
Operation
Replace.
Replace the crankshaft.
Check the alignment
Replace.
Operation
Replace the piston and correct the cylinder.
Inspect (for any replacement of the rollers of the connecting rod
small end, see the section Fitting clearances).
Troubleshooting
TROUBL - 43