APRILIA SX 125 User Manual

Removing the head cover
•
Undo and remove the four Allen
screws fixing the head cover.
•
Remove the head cover.
•
Remove both O-rings.
Removing the cylinder head
•
Remove the head cover.
•
Remove the five M8 Allen screws and
the locking washers.
•
Remove the combustion chamber in-
sert together with the O-Ring.
See also
Removing the head cover
Cylinder head
Checking the cylinder head
HEAD
•
Clean off any combustion deposits in
the combustion chamber as well as
scales on the surfaces in contact with
the cooling water.
•
Make sure the insert in the combustion
chamber is not damaged and the spark
plug thread is in good conditions.
•
Make sure the seal surfaces are
smooth and not damaged.
RX SX 125 Engine
ENG - 105

APRILIA SX 125 Specifications

General

Displacement	124.2 cc
Cooling System	Liquid cooled
Fuel System	Electronic fuel injection
Transmission	6-speed
Rear Suspension	Monoshock
Front Tire	100/80-17
Rear Tire	130/70-17
Compression Ratio	12.5:1
Starter	Electric
Clutch	Wet multi-plate
Front Brake Disc	300 mm
Rear Brake Disc	220 mm
Dry Weight	134 kg
Bore x Stroke	58 mm x 47 mm
Max Power	11 kW (15 HP) @ 10, 000 rpm
Front Suspension	41 mm USD fork
Front Brake	Single 300 mm disc
Rear Brake	Single disc
Fuel Tank Capacity	7 liters
Frame	Steel perimeter
Engine Type	Single-cylinder, 4-stroke