APRILIA SX 125 User Manual

•
Move the vehicle forward so as to also check the chain vertical oscillation in other positions;
clearance should remain constant during all wheel rotation phases.
CAUTION
IF CLEARANCE IS GREATER AT SOME POSITIONS, THIS MEANS THAT SOME CHAIN LINKS
ARE FLATTENED OR JAMMED.
TO AVOID THE RISK OF SEIZURE, LUBRICATE THE CHAIN ON A REGULAR BASIS.
Adjust backlash if it is uniform but over or below 25
- 35 mm (0.99 -1.38 in), adjust it.
CAUTION
GET A SPECIFIC REAR SERVICE STAND (OPT) TO ADJUST THE CHAIN.
If chain tension needs adjusting after the check:
•
Place the scooter on its rear service
stand (OPT).
•
Loosen the nut (1) completely.
WHEEL CENTRING IS CARRIED OUT USING IDENTIFIA-
BLE FIXED REFERENCES (2-3) IN THE TENSIONER
MOUNTS ON THE SWING ARMS BEFORE THE WHEEL
PIN.
•
Loosen both lock nuts (4).
•
Actuate on the set screws (5) and ad-
just the chain backlash checking that
the references (2 - 3) match on both
sides of the vehicle.
•
Tighten both lock nuts (4).
•
Tighten the nut (1).
•
Wheel nut tightening torque (1):
Locking torques (N*m)
Rear wheel fixing pin 100
Chain sliders
CAUTION
FOR SPACE REASONS DETACH THE CHAIN.
Chassis RX SX 125
CHAS - 182

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