Yamaha TX650 III (1977-79)

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The Yamaha TX650 III motorcycle was produced from 1977 to 1979 and featured a four-stroke, parallel twin cylinder engine with a capacity of 653cc. The engine had a compression ratio of 8.4:1 and was cooled by air with lubrication from a wet sump. Induction was accomplished via two Mikuni carburetors, and ignition was provided by a battery and induction coil. The bike had a maximum power output of 39.5 kW/53 hp at 7200 rpm and a maximum torque of 54 Nm/5.5 kgf-m/39.8 lb-ft at 6800 rpm. The transmission featured five speeds, and the final drive was via chain. The front suspension was telescopic forks, and the rear suspension had dual shock absorbers. The front brakes consisted of twin hydraulic discs, while the rear brakes were drums. The bike had a maximum speed of 185 km/h or 115 mph. The dimensions of the bike were 2175 mm in length, 780 mm in width, and 1090 mm in height. The wheelbase was 1435 mm, the ground clearance was 150 mm, and the seat height was 810 mm. The bike had a dry weight of 191 kg and a wet weight of 217 kg. The fuel capacity was 15 litres, and the oil capacity was 2.5 litres. The average fuel consumption was 5.0 L/100 km or 47 US mpg.

Technische Daten:

Make Model: Yamaha TX 650-II

Year: 1977 – 79


Motor: Viertakt, Parallel-Zweizylinder, SOHC, 2 Ventile pro Zylinder.
Hubraum: 653 cm³ / 39,8 cu in
Bohrung x Hub: 75 x 74 mm
Verdichtungsverhältnis: 8,4:1
Kühlsystem: Luftgekühlt
Schmierung: Nasssumpf
Induction: 2 x Mikuni carburetors
Zündung: Batterie, Induktionsspule
Starten: Elektrisch und Kick
Max. Leistung: 39,5 kW / 53 PS @ 7200 U/min
Max. Drehmoment: 54 Nm / 5,5 kgf-m / 39,8 lb-ft @ 6800 U/min
Getriebe: 5-Gang
Endantrieb: Kette
Vordere Federung: Teleskopgabel
Hintere Aufhängung: Doppelstoßdämpfer

Bremsen vorne: Hydraulische Doppelscheiben, 267 mm
Hintere Bremsen: Trommel
Vorderradreifen: 3.50H-19 4PR
Hinterreifen: 4.00H-18 4PR
Dimensions: Length: 2175 mm / 85.6″Width: 780 mm / 30.7″Height: 1090 mm / 42.9″
Wheelbase: 1435 mm / 56.5″
Bodenfreiheit: 150 mm / 5,5″
Seat Height: 810 mm / 31.9″
Trockengewicht: 191 kg / 420 lbs
Nassgewicht: 217 kg / 478 lbs
Kraftstoffkapazität: 15 Liter / 4.0 US gal
Durchschnittlicher Verbrauch: 5,0 L/100 km / 20 km/l / 47 US mpg
Ölkapazität: 2,5 Liter / 2,6 US qts
Höchstgeschwindigkeit: 185 km/h / 115 mph

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