In 1988, the Italian motorcycle maker released the Aprilia ETX 350, the slightly larger displacement version of the 125cc ETX. The bike came with the same package as previous models without any significant modifications.
The Aprilia ETX 350 was a middle-class dual-purpose machine suitable for the more adventurous among Aprilia's fans, no matter their experience levels. It also fits the needs of novice and experienced riders.
The bike had standard features in the aesthetic department, such as wire-spoke wheels, a high-mounted front mudguard, a small front cowl with a square headlight and a small windscreen, a one-piece dual seat, a luggage rack, and an under-seat-mounted exhaust system.
The motorcycle was manufactured around a steel frame with a hydraulic telescopic fork handling the front suspension and an adjustable shock absorber controlling the rear end, offering optimum suspension performance and handling capabilities.
In the braking department, the bike's wire-spoke wheels were fitted with a 260 mm disc mounted on the front wheel and a 230 mm disc mounted on the rear wheel, providing optimum stopping performance.
As for the power figures, the 1988 Aprilia ETX 350 had installed a 349cc four-stroke single-cylinder air-cooled engine at its core, fed by a Dell'Orto carburetor, boasting 33 hp with a peak force at 7,500 rpm and 28 Nm (21 lb-ft) torque at 6,250 rpm.