In 1988, the Italian motorcycle manufacturer launched the Aprilia AF1 125 Sintesi, a motorcycle part of the second series. It was slightly different in the mechanic and visual departments, offering a more modern appearance.
The bike was fitted with standard features, such as a full fairing with a dual headlight system, a medium-sized windscreen, a two-piece dual seat, a single exhaust system with a silencer mounted on the left side, a single-sided swingarm, and new multi-spoke aluminum wheels.
The bike was built around a steel frame with a 38 mm upside-down telescopic fork with 120 mm travel on the front and a Sebac shock absorber with 120 mm of travel on the rear, offering optimum suspension performance.
As for the braking performance, the bike's wheels were fitted with a 320 mm floating brake disc on the front and a 240 mm brake disc on the rear wheel. The discs were squeezed by a four-piston Brembo caliper on the front wheel and a dual-piston caliper on the rear.
In the performance department, the 1988 Aprilia AF1 125 Sintesi had its heartbeat set by a 124cc two-stroke liquid-cooled single-cylinder engine with a 28 mm Dell'Orto carburetor feeding the piston, boasting 28 hp at 10,500 rpm and 18 Nm (13 lb-ft) torque at 10,000 rpm.
The power produced by the engine was handled by a six-speed manual transmission that sent it to the rear end via a final chain drive, pushing the motorcycle to a top speed of 169 kph (103 mph).