The Aprilia ST 125 was a motorcycle produced from 1982 to 1984. It was powered by a two-stroke, single cylinder engine with a capacity of 124cc and a compression ratio of 14.5:1. The bike had a liquid cooling system and used an A28 mm Dell’Orto PHBH AS carburettor for induction. It had electronic ignition and a 12V 5.5 Ah battery with a generator that provided 130W of power. The bike used a kick start and a multi-disc oil bath clutch. It delivered a maximum power of 13.8 Nm / 18.5 hp @ 8250 rpm and had a six-speed transmission and chain final drive. The frame was a double cradle tubular steel design, and the suspension comprised a non-adjustable ~A32mm Marzocchi fork at the front and a swingarm with single shock absorber at the rear. The bike featured a single ~A230 mm disc brake at the front and a ~A160mm drum brake at the rear. It had a front wheel size of 2.75-18 and a rear wheel size of 3.00-18.
Technical specifications:
Make Model: Aprilia ST 125
| Year | 1982 – 84 |
|---|---|
| Engine | Two stroke, single cylinder |
| Capacity | 124 cc / 7.6 cu in |
| Bore x Stroke | 52.8 mm x 57mm |
| Compression Ratio | 14.5:1 |
| Cooling System | Liquid cooled |
| Induction | ~A28 mm Dell’Orto PHBH AS |
| Ignition | Electronic |
| Battery | 12V 5.5 Ah |
| Generator | 130W |
| Starting | Kick |
| Clutch | Multi-disc oil bath |
| Max Power | 13.8 Nm / 18.5 hp @ 8250 rpm |
| Transmission | 6 Speed |
| Final Drive | Chain |
| Frame | Double cradle tubular steel |
| Front Suspension | Marzocchi ~A32mm fork. non-adjustable |
| Rear Suspension | Swingarm with single shock absorber |
| Front Brakes | Single ~A230 mm disc |
| Rear Brakes | ~A160mm drum |
| Front Wheel | 2.75-18 |
| Rear Wheel | 3.00-18 |
