Yamaha TZR250
| Manufacturer | Yamaha Motor Company |
|---|---|
| Production | 1986–1995 |
| Predecessor | Yamaha RD250 |
| Class | Sport bike |
| Engine | 259 cc (15.8 cu in) 2-stroke parallel-twin |
| Bore / stroke | 56.4 mm × 50 mm (2.2 in × 2.0 in) |
| Compression ratio | 5.9:1 |
| Power | 45 hp (34 kW) (restricted) |
| Wheelbase | 54.1 in (1,370 mm) |
| Weight | 280 lb (127 kg) (dry) 320 lb (150 kg) (wet) |
| Related | Yamaha R1-Z Yamaha TDR250 Yamaha TZ250 Yamaha TZR125 |
The Yamaha TZR250 is a motorcycle manufactured and produced by the Japanese motorcycle manufacturer Yamaha between 1986 and 1995.
Yamaha produced the road going two-stroke motorcycle, loosely based on the TZ250 Yamaha racing bike. Parallel-twin, reverse cylinder and finally 90° V-twin variants were produced. It evolved as a natural replacement for the popular RD 250/Yamaha RD350LC series of the 1980s. It has the Yamaha Power Valve System 'YPVS' which raises and lowers the exhaust port depending on the rpm of the engine. The YPVS servo motor starts to open at about 6,000rpm. In standard form it produced 45 hp due to the restrictive standard exhausts and ignition boxes.