Yamaha TZR250 (1991)

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