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Yamaha GX 750 Sport (1978-79) vs Yamaha RS 100 (1978-79) vs Yamaha XS 650E (1978) vs Yamaha TT 500 (1978-81)

Comparison technical specifications


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1978 Yamaha GX 750 Sport
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1978 Yamaha RS 100
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1978 Yamaha XS 650E
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1978 Yamaha TT 500
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Make: Yamaha Yamaha Yamaha Yamaha
Model: GX 750 Sport RS 100 XS 650E TT 500
Years: 1978-79 1978-79 1978 1978-81
Engine: Four stroke, transverse three cylinder. DOHC Two stoke, torque induction, single Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder. Four stroke, single cylinder
Capacity: 747 cc / 45.5 cu-in 97 cc / 5.9 cu-in 653 cc / 39.8 cu in 499 cc / 30.4 cu-in
Bore x Stroke: 68 х 68.6 mm 52 x 45.6 mm 75 x 74 mm 87 х 84 mm
Cooling System: Air cooled Air cooled Air cooled Air cooled
Compression Ratio: 8.5:1 7.0 : 1 8.4:1 9.0 :1
Induction: Mikuni Thorex SU type BS34 VM20SH carburetor 2 x Mikuni BS38 carburetors 38mm Mikuni
Ignition: Battery point Magneto, CB/coil Battery, induction coil Flywheel magneto
Starting: Electric Kick Electric and kick Kick
Max Power: 67 hp / 50 kW @ 7000 rpm 11 hp / 8.1 kW @ 8500rpm 39.5 kW / 53 hp @ 7200 rpm 27 hp / 19.7 kW @ 5900 rpm
Max Torque: 6.3 kgf-m @ 6500 rpm 10.1 Nm / 1.03 kgf-m @ 700rpm 54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 6800 rpm 27.8 ft-lb / 37.6 Nm @ 5500 rpm
Transmission: 5 Speed 5 Speed 5 Speed 5 Speed
Final Drive: Shaft Chain Chain Chain
Front Suspension: Telescopic forks Telescopic forks Telescopic forks Telescopic fork
Rear Suspension: Dual shocks Dual shocks Dual shock absorbers Swinging arm
Front Brakes: Single disc Drum Twin hydraulic discs, 267 mm Drum
Rear Brakes: Single disc Drum Drum Drum
Front Tyre: F3.25-19 2.75-18 3.50H-19 4PR 3.00-21
Rear Tyre: 4.00-18 3.00-18 4.00H-18 4PR 4.60-18
Dry Weight: 229 kg / 502.6 lbs 91 kg / 200.6 lbs 191 kg / 420 lbs 118.8 kg / 262 lbs
Fuel Capacity: 17 Litres / 4.5 US gal 10 Litres / 2.6 US gal 15 Litres / 4.0 US gal 8.5 Litres / 2.24 US gal