Aprilia STX 125 (1985)

The Aprilia STX 125 is a two stroke, single cylinder motorcycle produced in 1985. It has a 124cc engine with a compression ratio of 14.5:1 and a maximum power of 15.7 kW / 21hp at 8000 rpm. It features a liquid cooled system, 26 Dell’Orto PHBH AS induction, and electronic ignition. The motorcycle has a six speed transmission and a chain final drive. The frame is a double cradle tubular steel with a 26.5 degree rake and an 86mm trail. Front suspension is non-adjustable Marzocchi ~A32 mm and the rear suspension is a swingarm with a single shock absorber. Braking is provided by a single ~A240 mm front disc and a single ~A230 mm rear disc, with 100-90 -16 front and 100-90 -18 rear tyres. The seat height is 800mm / 31.5in and the dry weight is 104 kg / 229 lbs. The top speed for this motorcycle is 135 km/h / 83.9 mph.

Technical specifications:

Make Model: Aprilia STX 125

Year: 1985
Engine: Two stroke, single cylinder
Capacity: 124cc / 7.6 cu in
Bore x Stroke: 52.8 mm x 57mm
Compression Ratio: 14.5:1
Cooling System: Liquid cooled
Induction: 26 Dell’Orto PHBH AS
Ignition: Electronic
Starting: Kick
Clutch: Multi-disc oil bath
Max Power: 15.7 kW / 21hp @ 8000 rpm
Transmission: 6 Speed
Final Drive: Chain
Frame: Double cradle tubular steel
Rake: 26.5 degrees
Trail: 86 mm / 3.4 in
Front Suspension: Marzocchi ~A32 mm, non-adjustable
Rear Suspension: Swingarm with single shock absorber
Front Brakes: Single ~A240 mm disc
Rear Brakes: Single ~A230 mm disc
Front Tyre: 100-90 -16
Rear Tyre: 100-90 -18
Seat Height: 800 mm / 31.5in
Dry Weight: 104 kg / 229 lbs
Top Speed: 135 km/h / 83.9 mph