The TXR 312M followed the TX 311M as Aprilia's late-1980s trials bike, keeping the 277 cc rotary-valve two-stroke single and six-speed gearbox in a…
| MODEL | APRILIA TXR 312M 1988 - 1990 |
| Year | 1988 - 1990 |
| Engine Type | Single-cylinder, two-stroke |
| Displacement / Capacity | 277 cc / 16.9 cu in |
| Bore X Stroke | 76 x 61 mm / 3.0 x 2.4 in |
| Compression Ratio | 8.5:1 |
| Cooling System | — |
| Max Power | 17 hp |
| Max Torque | — |
| Ignition | Electronic |
| Induction | Rotary valve, Dell'Orto carburettor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6-speed, gear primary drive |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Chrome-moly double-downtube |
| Front Suspension | Betor fork |
| Rear Suspension | Betor shock |
| Front Brakes | Single disc |
| Rear Brakes | Single disc |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | 52 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 90 kg / 198.4 lb |
| WHEEL SPECS | |
| Front Tyre | 2.75-21 |
| Rear Tyre | 4.00-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 4.5 Litres / 1.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The TXR 312M followed the TX 311M as Aprilia's late-1980s trials bike, keeping the 277 cc rotary-valve two-stroke single and six-speed gearbox in a chrome-moly frame. The most visible change was a disc brake at the rear as well as the front, together with Betor suspension at both ends and an even smaller 4.5-litre tank. It was part of the trials range Aprilia built up before its Climber won the 1992 world championship.
