Yamaha SRX250 (1987-90)

The Yamaha SRX250 was a motorcycle produced from 1987 to 1990. It had a four stroke, single cylinder, DOHC, 4 valves engine with a capacity of 249 cc. The bore and stroke measured at 73 mm and 59.6 mm, respectively. The cooling system was air cooled, with a compression ratio of 10.0:1. The Y22PV Teikei carburetor and TCI ignition were used for induction and starting respectively. The maximum power output was 32 hp at 10,000 RPM, and the maximum torque was 2.4 kgf-m at 8,500 RPM. The bike was equipped with six-speed transmission and final chain drive. The front suspension was centre axle 33mm forks, while the rear suspension used a single shock with adjustable spring preload. The front wheel travel was 140 mm, while the rear wheel travel was 100 mm. The bike was fitted with a single disc 2 piston caliper front brake and a drum rear brake. The wheel sizes were 90/90-16 and 100/90-18 for the front and rear respectively. The seat height was 780 mm, and the dry weight was 123 kg, while the wet weight was 137 kg. The fuel capacity was 9 litres, and it had a range of 150 km per tank.

Technical specifications:

Make Model: Yamaha SRX 250

Year: 1987 – 90
Engine: Four stroke, single cylinder, DOHC, 4 valves
Capacity: 249 cc / 15.2 cu-in
Bore x Stroke: 73 59.6 mm
Cooling System: Air cooled
Compression Ratio: 10.0:1
Induction: Y22PV Teikei carburetor
Ignition: TCI
Starting: Electric
Max Power: 32 hp / 23.8 kW @ 10000 rpm
Max Torque: 2.4 kgf-m / 17.3 lb-ft @ 8500 rpm
Transmission: 6 Speed
Final Drive: Chain
Front Suspension: Centre axle 33mm forks
Front Wheel Travel: 140 mm / 5.9 in
Rear Suspension: Single shock, adjustable spring preload
Rear Wheel Travel: 100 mm / 3.9 in
Front Brakes: Single disc 2 piston caliper
Rear Brakes: Drum
Front Tyre: 90/90-16
Rear Tyre: 100/90-18
Seat Height: 780 mm / 30.7 in
Dry Weight: 123 kg / 371 lbs
Wet Weight: 137 kg / 302 lbs
Fuel Capacity: 9 Litres / 2.3 US gal