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2025 Aprilia SX 125

Motorcycle

Designed for the most demanding and sports-oriented younger riders

The Aprilia SX 125 makes a statement with its top-range sports feature, outstanding performance and distinctive design. It is also the only bike in this segment to boast ABS with anti-rollover, which is fitted on the front wheel.

Heir to Aprilia’s successful history in off-road competition, the SX 125 benefits from advanced technology that makes it a true contender for two-wheeler debutants with serious aspirations.

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SX 125 AND RX 125 - TECHNICAL DATA SHEET

ENGINE TYPE

Single-cylinder, 4-stroke, 4-valve, DOHC, liquid cooling

BORE AND STROKE

58 x 47 mm

TOTAL ENGINE CAPACITY

124.2 cc

COMPRESSION RATIO

12.0~12.6 : 1

MAX POWER

11 kW at 10,000 rpm

MAXIMUM TORQUE AT CRANKSHAFT

11.2 Nm at 8,000 rpm

IGNITION

ECU Electronics Magneti Marelli MIUG4 ø 32 mm

STARTING

Electrical

LUBRICATION

Wet sump

TRANSMISSION

6 speed, drive ratio: 1st 11/33 2nd 15/30 3rd 18/27 4th 20/24 5th 25/27 6th 23/22

CLUTCH

Multi plate wet clutch

PRIMARY DRIVE

Straight cut gears, drive ratio: 29/69

FINAL DRIVE

Chain, drive ratio: SX: 13/62 RX: 13/69

CHASSIS

Twin-tube steel frame

FRONT SUSPENSION

Upside down fork with Ø 41 mm stanchions, 240 mm excursion

REAR SUSPENSION

Steel swingarm, monoshock with progressive link system, wheel travel 210 mm

BRAKES

SX: Front: Ø 300 mm stainless steel disc with floating calliper Rear: Ø 220 mm stainless steel disc with floating calliper RX Front: Ø 260 mm disc with floating calliper Rear: Ø 220 mm disc with floating calliper Metal-braided connecting hoses.

WHEELS

SX: Front: 2.5 X 17" rear: 3.5 X 17” RX : Front: 1.85 X 21" rear: 2.15 X 18”

TYRES

SX: Front: 100/80 – 17” rear 130/70 -17” RX : Front: 90/90 – 21” rear 120/80 -18”

DIMENSIONS

Max. length: 2075 mm (RX 2145 mm) Max. width: 820 mm Wheelbase: 1425 mm (1430 mm) Max. height: 1140 mm (RX 1180 mm) Saddle height: 880 mm (RX 905 mm)

WEIGHT

134 Kg (kerb weight with full fuel tank)

CONSUMPTION (WMTC CYCLE)

2.6 l/100 km

CO2 EMISSIONS (WMTC CYCLE

60 g/km

FUEL TANK CAPACITY

7 litres

HOMOLOGATION

Euro 5

Biconical handlebar

The aluminium biconical handlebar makes for the type of smooth, pleasurable riding that only a real motorbike knows how to deliver. Handily placed commands make it easy to take on any curve, transforming every outing into an adventure.

Digital dash

The multifunction digital instrument panel includes a trip diary, with the facility to visualise maximum speed and view battery tension, along with two partial odometers that display the kilometres travelled.

125cc single cylinder

The engine, fitted with a Marelli MIUG4 unit, delivers maximum power at lower speeds, reduced fuel consumption and faster throttle response. The result is a bike that is extremely easy to handle whether commuting around town or riding off road.

High-level chassis

The Aprilia SX’s safety is entrusted to advanced suspension and a braking system with anti-rollover, while the front wheel is fitted with ABS for excellent power and adjustability.