APRILIA RX 125 Service Station Manual

Checking the counter shaft
•
Check countershaft for wear: (1) Fly-
wheel side bearing seat, Minimum
wear limit diameter: 14.94 mm (0.5882
in) ; (2) Clutch side bearing seat, Mini-
mum wear limit diameter: 24.94 mm
(0.9819 in) ;
•
Make sure the groove of the snap ring
(3) is not worn or damaged.
•
Check the internal (4) and external
toothing (5) of the gears controlling the
countershaft for wear.
THE GEARS AND THE O-RINGS ON THE REAR SIDE OF
THE COUNTERSHAFT GEAR ON THE CRANKSHAFT
MUST BE REPLACED AFTER 15,000 KM.
Installing the crankshaft
UPON REFITTING, ALWAYS REPLACE THE GASKETS, THE SAFETY CIRCLIPS, THE O-RINGS
AND THE OIL SEALS REMOVED.
•
Pre-warm the crankcase at 90 - 100 °
C (194 - 212 °F)
•
Fix the flywheel side crankcase half to
the support and tighten the screw and
the spacer.
•
If necessary, fit the shim washers nee-
ded to the flywheel side crankcase half.
•
Apply LOCTITE Anti-Seize on the
bearing seats on the crankshaft.
•
Heat up the engine crankcase.
•
Fit the bearings in their seats in the
crankcase.
•
Assemble the crankshaft in the warm
crankcase.
RX SX 125 Engine
ENG - 121

APRILIA RX 125 Specifications

General

Displacement	124.2 cc
Max Power	11 kW (15 HP) @ 10, 700 rpm
Torque	11.2 Nm @ 8, 000 rpm
Fuel System	Electronic fuel injection
Transmission	6-speed
Rear Suspension	Monoshock
Front Brake	Single disc, 300 mm
Rear Brake	Single disc, 220 mm
Seat Height	905 mm
Weight	134 kg (dry)
Engine Type	Single cylinder, 4-stroke
Cooling System	Liquid-cooled
Front Suspension	Upside-down fork
ABS	Yes