The Yamaha TZR 250R is a two-stroke motorcycle with a 249.7 cc V-twin cylinder engine and rear valve induction. It has a liquid cooling system and a compression ratio of 7.5:1. The bike features 2x Mikuni flatside carburetors and microcomputer-controlled ignition, with a maximum power of 45 hp at 9500 rpm and torque of 3.8 kgf-m at 8000 rpm. The transmission has 6 speeds and the final drive is through a chain. The front suspension is 39mm upside-down forks, with a monocross linkage for the rear suspension. The bike has 2X disc 4-piston calipers for front brakes and a single disc 2-piston caliper for the rear, with a front tyre size of 110/70 Z17 and a rear tyre size of 150/60 Z17. The dimensions of the bike are 1960 mm in length, 680 mm in width and 1075 mm in height, with a wheelbase of 1340 mm and a seat height of 780 mm. The dry weight of the bike is 126 kg, with a fuel capacity of 15 litres. The top speed of the Yamaha TZR 250R is 180.2 km/h or 112 mph. It was positively reviewed in Motosprint 1991 and Performance Bike 1991.
Technical specifications:
Make Model: Yamaha TZR 250R
| Year | 1991 |
|---|---|
| Engine | Two stroke, 90 degrees V-Twin cylinder, read valve induction |
| Capacity | 249.7 cc / 15.2 cu-in |
| Bore x Stroke | 56 x 50.7 mm |
| Cooling System | Liquid cooled |
| Compression Ratio | 7.5:1 |
| Induction | 2x Mikuni flatside carburetor |
| Ignition | Microcomputer controlled |
| Starting | Kick |
| Max Power | 45 hp / 33.6 kW @ 9500 rpm |
| Max Torque | 3.8 kgf-m / 40 Nm @ 8000 rpm |
| Transmission | 6 Speed |
| Final Drive | Chain |
| Front Suspension | 39mm Upside-down forks |
| Rear Suspension | Monocross linkage |
| Front Brakes | 2X disc 4 piston calipers |
| Rear Brakes | Single disc 2 piston caliper |
| Front Tyre | 110/70 Z17 |
| Rear Tyre | 150/60 Z17 |
| Dimensions | Length 1960 mm / 77.1in Width 680 mm / 26.7 in Height 1075 mm / 42.3 in |
| Wheelbase | 1340 mm / 52.8 in |
| Seat Height | 780 mm / 30.7 in |
| Dry Weight | 126 kg / 277.8 lbs |
| Fuel Capacity | 15 Litres / 4.0 US gal |
| Top Speed | 180.2 km/h / 112 mph |
| Road Test | Motosprint 1991 Performance Bike 1991 |
