Checking The Ignition Timing - APRILIA Tuono 660 2021 Service Station Manual

Maintenance
•
Disconnect the vacuum valve (18) from
the support.
•
Remove the complete filter box (19).
•
If necessary, it is possible to separate the upper duct from the filter box base.

Checking the ignition timing

To proceed with the engine timing check, it is nec-
essary to first remove the fuel tank, the side fair-
ings, the complete filter box, the throttle body, the
canister, the ignition switch assembly and clutch
housing.
Then proceed as described:
COMPONENTS DISASSEMBLY
•
Working from the left side of the mo-
torcycle, having removed the inspec-
tion cap, rotate the engine clockwise
until the top dead centre of cylinder 1
is reached.
•
Rotate a further +20° to intercept the
hole in the crankcase on the right side
of the vehicle near the crankshaft tim-
ing gear.
•
Insert the first centring pin (1).
MAIN - 68
RS 660 - Tuono 660