Yamaha XJ 750R (1981-82) vs Yamaha RD 200 (1977-78) vs Yamaha XS 1100G (1981) vs Yamaha TZR 250RS (1993)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | XJ 750R | RD 200 | XS 1100G | TZR 250RS |
| Years: | 1981-82 | 1977-78 | 1981 | 1993 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder. | Two stroke, torque induction, parallel twin | Four stroke transverse four cylinder, DOHC, 2 valves per cylinder. | Two stroke, 90° V-Twin cylinder, read valve induction |
| Capacity: | 749 cc / 45.6 cu-in | 195 cc / 11.8 cu-in | 1101 cc / 67.2 cu-in | 249.7 cc / 15.2 cu-in |
| Bore x Stroke: | 65 х 56.5 mm | 52 х 46 mm | 71.5 x 68.6 mm | 56 x 50.7 mm |
| Cooling System: | Air cooled | Air cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 9.5:1 | 7.1:1 | 9.2:1 | 7.5:1 |
| Induction: | 4X 32mm Hitachi CV | 2x Y20P Carburetors | 4x Mikuni BS 34SS Carburettor | 2x Mikuni flatside carburetor |
| Ignition: | Transistorized | Battery coil | TCI additional vacuum adjusted! / electric kick starter - Witch is separated from the engine, for emergency mounting only | Microcomputer controlled |
| Starting: | Electric | Electric & Kick | Electric | Kick |
| Max Power: | 81 hp / 59.6 kW @ 9000 rpm | 20 hp / 14.7 kW @ 8000 rpm | 95 hp / 70.8 kW @ 8500 rpm | 45 hp / 33.6 kW @ 9500 rpm |
| Max Torque: | 48.5 Nm / 35.7 lb-ft @ 7000 rpm | 1.9 kgf-m / 8.6 Nm @ 7000 rpm | 9.2 kgf-m / 66.5 lb-ft @ 6500 rpm | 3.8 kgf-m / 40 Nm @ 8000 rpm |
| Transmission: | 5 Speed | 5 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Shaft | Chain |
| Front Suspension: | Telescopic fork, 150mm wheel travel. | Telescopic forks | Telescopic fork. | 39mm Upside-down forks |
| Rear Suspension: | Swing arm, twin shocks 96mm wheel travel. | Dual shocks | Dual shocks Swing arm, preload adjustable | Monocross linkage |
| Front Brakes: | 2x 294mm disc 2 piston calipers | Single 245 mm disc | 2x 298mm discs | 2X disc 4 piston calipers |
| Rear Brakes: | Drum | Drum | Single 298mm disc | Single disc 2 piston caliper |
| Front Tyre: | 100/90-18 | 2.75-18-4PR | 3.50-19 | 110/70 Z17 |
| Rear Tyre: | 120/90-18 | 3.25-18-4PR | 4.50-17 | 150/60 Z17 |
| Seat Height: | 775 mm / 30.5 in | 780 mm / 30.7 in | 800 mm / 31.5 in | 780 mm / 30.7 in |
| Fuel Capacity: | 19 Litres / 5.0 US gal | 11.5 Litres / 3.0 US gal | 22 Litres / 5.8 gal | 15 Litres / 4.0 gal |