BMW K 75 (1985-86) vs Yamaha SRX 600 (1989-97) vs Yamaha XT 250 (2016-17) vs Yamaha YZF 600 R6 (2007) vs Suzuki TL1000S (2001-02) vs Yamaha RD 125 (1979-80)
Comparison technical specifications
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| Make: | BMW | Yamaha | Yamaha | Yamaha | Suzuki | Yamaha |
| Model: | K 75 | SRX 600 | XT 250 | YZF 600 R6 | TL1000S | RD 125 |
| Years: | 1985-86 | 1989-97 | 2016-17 | 2007 | 2001-02 | 1979-80 |
| Engine: | Four-stroke, horizontal three cylinder in-line, DOHC, 2 valves per cylinder | Four stroke, single cylinder, SOHC, 4 valve | Four stroke, single cylinder. SOHC, 2 valve | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, 90°-V-twin, DOHC, 4 valves per cylinder | Two stroke, parallel twin |
| Capacity: | 740 cc / 45 cub. in. | 608 cc / 37.1 cu-in | 249 cc / 15.2 cu-in | 599 cc / 36.5 cu-in | 996 cc / 60.8 cu-in | 124 cc / 7.6 cu-in |
| Bore x Stroke: | 67 x 70 mm | 96 х 84 mm | 74.0 x 58.0mm | 67 x 42.5 mm | 98 x 66 mm | 43 х 43 mm |
| Compression Ratio: | 11.0:1 | 8.5:1 | 9.5;1 | 12.4;1 | 11.3:1 | 6.8:1 |
| Cooling System: | Liquid cooled | Air cooled | Air cooled | Liquid cooled | Liquid cooled | Air cooled |
| Induction: | Electronic injection, Bosch LE-Jetronic | 27mm Teikei 2KY27PV carburetor | Mikuni 33mm throttle body fuel injection | Fuel Injection 38mm throttle bodies | 2 x 52 mm Mikuni Denso EFI | 2x 18mm Teikei carburetors |
| Starting: | Electric | Kick | Electric | Electric | Electric | Kick |
| Max Power: | 55 kW / 75 hp @ 8500 rpm | 45 hp / 34 kW @ 6500 rpm | 18 hp / 13.1 kW @ 7500 rpm | 124.6 hp / 91.7 kW @14500 rpm | 91.1 kW / 125 hp @ 8500 rpm | 17 hp / 12.4 kW @ 8500 rpm |
| Max Torque: | 68 Nm / 6.9 kgf-m / 50 ft lb @ 6750 rpm | 4.9 kgf-m / 34 lb-ft / 46 Nm @ 5500 rpm | 19 Nm / 14.5 lb-fts @ 6500 rpm | 69.1 Nm / 7.05 kg-m @ 11000 rp @ 1100 rpm | 103 Nm / 10.5 kgf-m / 75.9 lb-ft @ 8000 rpm | 1.3 kgf-m @ 8000 rpm |
| Transmission: | 5 Speed | 5 Speed | 5 Speed | 6 Speed | 6 Speed | 5 Speed |
| Front Suspension: | Telescopic fork with hydraulic shock absorber. | 36mm Telescopic forks | 35mm Telescopic forks | 41mm upside down forks with 2-way compression damping adjustable | 43 mm Inverted telescopic fork, coil spring, fully adjustable spring preload, rebound and compression damping | 28 mm telescopic forks |
| Rear Suspension: | Monolever swinging arm. | Dual Kayaba shocks 5-way adjustable for preload | Monocross, Swingarm rebound-adjustable single shock | Fully adjustable rear shock absorber with 2-way compression damping | Rotary damping system, fully adjustable spring preload, compression and rebound damping | Dual rear shock pre-load adjustable |
| Front Brakes: | 2 x ∅285mm discs, 2 piston calipers | 2x 267mm disc | Single 245mm disc | 2x 320mm discs | 2 x 320mm Discs, 4 piston calipers | Single240mm disc |
| Rear Brakes: | Single ∅285mm disc | Single 240mm disc | Single 203mm disc | Single 220mm disc | Single 220 mm disc, 2 piston caliper | 130 mm Drum |
| Front Tyre: | 100/90-18 56H | 110/70-17 | 80/70-21 | 120/70 ZR17 | 120/70-17 | 2.75-18 |
| Rear Tyre: | 120/90-18 56H | 150/60-17 | 120/80-18 | 180/55 ZR17 | 180/60-17 | 3.00-18 |
| Seat Height: | 810 mm /31.9 in. or 760 mm / 29.9 in. for low seat model | 770 mm / 20.3 in | 830 mm / 32.7 in | 850 mm / 33.5 in | 835 mm / 32.9 in | 749 mm / 29.5 in |
| Fuel Capacity: | 21 liters / 5.54 US gal | 15 Litres / 3.9 gal | 9.6 Litres / 2.5 US gal | 17.5 Litres / 4.6 gal | 17 Litres / 4.4 US gal / 3.7 Imp gal | 11.5 Litres / 3.04 US gal |