Technical data

236
POSSIBLE CAUSE
WORK
POOR PERFORMANCE
ENGINE
Dirty-carburettor; feeding pump or vacuum
cock failure
Excessive scaling in the explosion chamber
Wrong timing or worn timing components
Clogged silencer
Air filter clogged or dirty
Engine oil level exceeding the maximum
Low compression: wear of linings,
cylinder and valve
Worn driving belt
Inefficient automatic transmission
Remove, wash with solvent, dry with compressed
air or replace.
Remove the scale from cylinder, piston, head and
valves.
Restore the timing or replace worn parts.
Replace.
Remove the sponge, wash with water and shampoo, then
impregnate it in a 50% mixture of fuel and specific oil,
then press it without squeezing, let it drip and replace it.
Check the causes and restore the correct level.
Replace worn parts.
Replace.
Check the pulley sliding and rollers, replace faulty
components, lubricate the mobile driven pulley guide
with grease specific.
Automatic starter failure Check: mechanical sliding, electric connection and
presence of power supply, replace if required.
Clutch slipping Check and replace the clutch unit and/or the bell, if
required.
Overheated valves Remove the head and the valves, grind or replace the
valves.
Incorrect valve adjustment Adjust the valve clearance.
Valve seat deformed Replace the head unit.
Dirty air filter
Remove the sponge, wash with water and shampoo,
then impregnate it in a 50% mixture of fuel and spe-
cific oil, then press it without squeezing, let it drip
and replace it.
Defective float valve Check the proper sliding of the float and the valve effi-
ciency.