Aprilia STX 125

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Aprilia-stx-125-1986-1986-3.jpg
Aprilia STX 125
Manufacturer
Production 1986
Class Naked
Engine
liquid-cooled, two-stroke, single cylinder
Bore / Stroke 53.3mm x 53.3mm
Compression ratio 14.5:1
Horsepower 21.05 HP (15.7 KW) @ 8000RPM
Transmission Gear box: gears

Final Drive: chain

Clutch: wet multi-disc, manual
Suspension Front: 32mm Marzocchi telescopic fork
Rear: monoshock
Brakes Front: single 240mm disc
Rear: single 230mm disc
Front Tire 100-90 -16
Rear Tire 100-90 -18
Seat Height 31.5 inches (800 mm)
Weight 104.0 kg (wet)
Manuals Service Manual


The Aprilia STX 125 was a liquid-cooled, two-stroke, single cylinder Naked motorcycle produced by Aprilia in 1986. Claimed horsepower was 21.05 HP (15.7 KW) @ 8000 RPM.

Engine[edit | edit source]

A 53.3mm bore x 53.3mm stroke result in a displacement of just 124.0 cubic centimeters.

Drive[edit | edit source]

The bike has a gears transmission. Power was moderated via the wet multi-disc, manual.

Chassis[edit | edit source]

It came with a 100-90 -16 front tire and a 100-90 -18 rear tire. Stopping was achieved via single 240mm disc in the front and a single 230mm disc in the rear. The front suspension was a 32mm Marzocchi telescopic fork while the rear was equipped with a monoshock.

1986 Aprilia STX 125[edit | edit source]

1986 Aprilia STX 125 1986 Aprilia STX 125 1986 Aprilia STX 125 1986 Aprilia STX 125

The 1986 MY Aprilia STX 125 has, at its heart, a liquid-cooled, 124cc, single cylinder powerplant mated to a six-speed manual transmission and can produce a claimed 21 horsepower at 8000 rpm. This entry-level machine comes standard with features such as a 32mm Marzocchi telescopic fork, a single shock absorber as a rear suspension, front and rear disc brakes, a small, nose-fairing with a small windshield and a dual seat.