Checking The Ignition Timing; Checking The Valve Clearance; Braking System - VESPA LX Series User Manual

Vespa LX 125 - 150 i.e.

Checking the ignition timing

-Remove the flywheel fan.
-Rotate the flywheel until the reference (arrow)
matches the crankcase operation end as shown in
the figure (TDC). Make sure that the 2V reference
point on the camshaft control pulley is aligned with
the reference point on the head as shown in the
second figure. If the reference mark is opposite the
indicator on the head, make the crankshaft turn
once more.
-The TDC reference mark is repeated also be-
tween the flywheel cooling fan and the flywheel
cover.
To use this reference mark, remove the spark plug
and turn the engine in the opposite direction to the
normal direction of rotation using a compass span-
ner applied to the camshaft drive sprocket hous-
ing.
N.B.
TIME THE TIMING SYSTEM UNIT IF IT IS NOT IN PHASE.

Checking the valve clearance

-To check valve clearance, centre the reference marks of the timing system.
- Use a feeler gauge to check that the clearance between the valve and the register corresponds with
the indicated values. When the valve clearance values, intake and exhaust respectively, are different
from the ones indicated below, adjust them by loosening the lock nut and operate on the set screw with
a screwdriver.
Characteristic
Valve clearance
Intake: 0.10 mm (when cold)
Exhaust: 0.15 mm (when cold)

Braking system

Maintenance
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