Yamaha SRX250 (1987-90)

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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.

Technische Daten:

Make Model: Yamaha SRX 250

Year: 1987 – 90


Motor: Viertakt, Einzylinder, DOHC, 4 Ventile
Hubraum: 249 ccm / 15,2 cu-in
Bohrung x Hub: 73 59,6 mm
Kühlsystem: Luftgekühlt
Verdichtungsverhältnis: 10,0:1
Induction: Y22PV Teikei carburetor
Zündung: TCI
Anfahren: Elektrisch
Max Power: 32 hp / 23.8 kW @ 10000 rpm
Max Torque: 2.4 kgf-m / 17.3 lb-ft @ 8500 rpm
Getriebe: 6-Gang
Endantrieb: Kette
Front Suspension: Centre axle 33mm forks
Federweg Vorderrad: 140 mm / 5.9 in
Rear Suspension: Single shock, adjustable spring preload

Hinterradfederweg: 100 mm / 3.9 in
Vordere Bremsen: Einzelscheibe 2-Kolben-Bremssattel
Hintere Bremsen: Trommel
Front Tyre: 90/90-16
Rear Tyre: 100/90-18
Sitzhöhe: 780 mm / 30.7 in
Dry Weight: 123 kg / 371 lbs
Nassgewicht: 137 kg / 302 lbs
Kraftstoffkapazität: 9 Liter / 2.3 US gal

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