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.

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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