APRILIA SX 125 User Manual

•
Apply engine oil on the lubrication
ducts for the main bearings of the
crankshaft, on the head bearings and
on the rod small ends.
•
Make the ball retainer slide on the con-
necting rod.
•
Place the piston on the connecting rod
and insert the pin correctly in its posi-
tion.
FOR SAFETY REASONS COVER THE CRANKCASE WITH
A CLEAN CLOTH SO THAT THE SEEGER RINGS DO NOT
FALL INTO THE CRANKCASE.
•
Place the second seeger ring.
FOR SAFETY REASONS COVER THE CRANKCASE WITH
A CLEAN CLOTH SO THAT THE SEEGER RINGS DO NOT
FALL INTO THE CRANKCASE.
Installing the cylinder
•
Use the wrench for piston rings.
MAKE SURE THE PISTON RINGS ARE FITTED WITH THEIR ENDS BESIDE THE FIXING PIN IN
THE GROOVE. APPLY OIL FOR TWO-STROKE ENGINES TO THE CYLINDER WALL.
Specific tooling
AP0876973 Piston ring clamp 54 mm
Engine RX SX 125
ENG - 110

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