APRILIA SX 125 User Manual

•
The seal surface of the combustion
chamber insert gets slightly conic start-
ing from a 63 mm (2.48 in) diameter.
CYLINDER HEAD COVER
•
Make sure the seal surfaces of the two
O-rings are clean.
•
Make sure the cylinder head cover is
not damaged.
Cylinder-piston assembly
Removing the cylinder
•
Remove the head.
•
Working from both sides remove the
four fixing screws and collect the wash-
ers.
•
Take out the cylinder with utmost care
trying not to damage the piston.
•
Remove the gasket on the cylinder
base.
See also
Removing the cylinder head
Engine RX SX 125
ENG - 106

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