The Aprilia ST 125 marked a significant milestone in the company’s evolution, boasting a robust double-cradle chassis with substantial reinforcements behind the headstock.
Its suspension system was equally innovative, featuring a progressive rear swingarm with single shock absorber – the first of its kind on Italian roads. This cutting-edge design was a result of collaboration between Aprilia and the renowned Venetian house.
Powering the ST 125 is a high-performance engine, born from Hiro’s off-road expertise and extensively reworked for road use. Its six-speed gearbox ensures seamless transitions through the rev range, delivering an exhilarating riding experience.
This potent combination of innovative design and Japanese engineering makes the Aprilia ST 125 an unforgettable ride that still holds its own today.
Key Specifications
Engine Type
Two stroke, single cylinder
Engine Capacity
124 cc / 7.6 cu in
Max Power
13.8 Nm / 18.5 hp @ 8250 rpm
Seat Height
31.5 inches / 800 mm
*n/a – information not provided by manufacturer
All Specifications
Make & Model
Model
Aprilia ST 125
Year
1982 – 84
Engine
Engine Type
Two stroke, single cylinder
Displacement
124 cc / 7.6 cu in
Bore x Stroke
52.8 mm x 57mm
Compression Ratio
14.5:1
Max Horsepower
13.8 Nm / 18.5 hp @ 8250 rpm
Engine Management System
28 mm Dell’Orto PHBH AS
Cooling System
Liquid cooled
Performance
Top Speed
126.8 km/h / 78.8 mph
*n/a – information not provided by manufacturer
Transmission
Clutch
Multi-disc oil bath
Gearbox
6 Speed
Final Drive
Chain
Electrical & Electronics System
Battery
12V 5.5 Ah
Starter
Kick
Chassis & Suspension
Frame Type
Double cradle tubular steel
Front Suspension
Marzocchi 32mm fork. non-adjustable
Rear Suspension
Swingarm with single shock absorber
Wheels & Brakes
Front Wheel/Rim Size
2.75-18
Rear Wheel/Rim Size
3.00-18
Front Brakes
Single 230 mm disc
Rear Brakes
160mm drum
Dimension & Weights
Seat Height
31.5 inches / 800 mm
Dry Weight
104 kg / 229 lbs
Features
Conventional double-cradle tubular chassis
32mm Marzocchi fork
Progressive Sebach APS rear swingarm suspension with single shock absorber
Front disc brake
Rear drum brake
Six-speed transmission
Engine produced by Hiro (Japanese company)
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*We strive to provide the most comprehensive and accurate specifications possible. However, certain details may not be available if the manufacturer did not disclose them or if the information is no longer publicly accessible. If you find any discrepancy with any data on this site, please feel free to let us know at contact@throttlecraze.com
