Segment: Naked / Road
Production years: 1985, 1986
In 1985, the Italian motorcycle manufacturer released the Aprilia STX 125, an entry-level motorcycle that suited the youngest riders amongst Aprila fans as well as the more seasoned ones who wanted a fuel-efficient motorcycle.
The 1985 entry-level motorcycle came equipped with standard features, such as a front cowl with a square headlight, a windscreen, an engine cowl, a one-piece dual seat with passenger grab rails, a black-finished engine, and five-spoke aluminum wheels with road tires.
In the performance department, the 1985 Aprilia STX 125 had its soul brought to life by a 124cc liquid-cooled two-stroke single-cylinder engine mounted underneath the fuel tank. It was controlled by a 26 mm Dell'Orto carburetor and delivered an output power of 21 hp with a peak force at 8,000 rpm.
Its small engine was tied to a six-speed transmission with a wet multi-disc manual clutch that sent the power towards the rear axle via a final chain drive, pushing the motorcycle to a maximum speed of 135 kph (84 mph).
For suspension, the bike packed a 32 mm non-adjustable Marzocchi telescopic fork on the front and a dual-sided swingarm with a single shock absorber on the rear, providing excellent suspension performance and handling.
As for the stopping power, the bike relied on a single 240 mm brake disc mounted on the front and a single 230 mm brake disc mounted on the rear.
engine specs | Type: | liquid-cooled, two-stroke, single cylinder | Displacement: | 124 cm3 | Bore X Stroke: | 2.1x2.2 in OR 53 mm | Compression Ratio: | 14.5:1 | Horsepower: | 21/8000 KW(hp)/RPM | Torque: | 0/- lb-ft/RPM OR 0 Nm/RPM | Fuel System: | 26 DellOrto PHBH AS |
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transmission specs | Gearbox: | 6-speed, manual | Clutch: | wet multi-disc, manual | Primary Drive: | gears | Final Drive: | chain |
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chassis specs | Frame: | steel | Front Suspension: | 32mm Marzocchi telescopic fork | Rear Suspension: | monoshock | Front Brake: | single 240mm disc | Rear Brake: | single 230mm disc |
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dimension specs | Overall Length: | - | Overall Width: | - | Seat Height: | 31.5 in OR 800 mm | Wheelbase: | - | Ground Clearance: | - | Weight: | 229 lbs OR 104 kg | Fuel Capacity: | - |
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tyres specs | Front: | 100-90 -16 | Rear: | 100-90 -18 |
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