Aprilia TX311: history, specs, pictures

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Aprilia TX311
Also called TX311M, TX 311 M
Production 1986 - 1988
single cylinder, two-stroke
Bore / Stroke 76.0mm x 61.0mm
Top Speed 78 mph (125 km/h)
Horsepower 16.63 HP (12.4 KW) @ 6400RPM
Transmission Gear box: 6-speed
Final Drive: chain
Brakes Front: single disc
Rear: expanding brake
Front Tire 2.75-21
Rear Tire 4.00-18
Weight 85.0 kg (wet)
Fuel Capacity 1.72 Gallon (6.50 Liters)
Manuals Service Manual

The Aprilia TX311M was a single cylinder, two-stroke standard produced by Aprilia between 1986 and 1988. It could reach a top speed of 78 mph (125 km/h). Claimed horsepower was 16.63 HP (12.4 KW) @ 6400 RPM.


The engine was a liquid cooled single cylinder, two-stroke. A 76.0mm bore x 61.0mm stroke result in a displacement of just 277.0 cubic centimeters. Fuel was supplied via a rotary valves.


The bike has a 6-speed transmission.


It came with a 2.75-21 front tire and a 4.00-18 rear tire. Stopping was achieved via single disc in the front and a expanding brake in the rear. The TX311M was fitted with a 1.72 Gallon (6.50 Liters) fuel tank.