PIAGGIO MSS X9 EVOLUTION 250, Workshop Manual

Page: 41 / 262

Checking the ignition timing
- Remove the plastic cap on the flywheel cover
-Turn the flywheel until the reference mark « T » on
the rotor matches the reference mark on the fly-
wheel cover as shown in the figure (TDC). Make
sure that the 4V reference point on the camshaft
control pulley is aligned with the reference point on
the head as shown in the second figure. If the ref-
erence is opposite the indicator on the head, turn
the crankshaft once more.
For the use of this reference mark, remove the
spark plug and turn the engine in the direction that
is the reverse of the normal direction using a cal-
liper spanner applied to the camshaft command
pulley casing.
Checking the valve clearance
-To check valve clearance, centre the reference
marks of the timing system
- Use a thickness gauge to check that the clear-
ance between the valve and the register corre-
sponds with the indicated values. When the valve
clearance values, intake and drainage respective-
ly, are different from the ones indicated below,
adjust them by loosening the lock nut and operate
on the register with a screwdriver as shown in the
figure.
Intake: 0.10 mm (when cold)
Discharge: 0.15 mm (when cold)
Cooling system
MSS X9 Evolution 250
Maintenance
MAIN - 41