Yamaha XJ 600N (2001-04) vs Yamaha DT 125LC (1984) vs Yamaha SRX 600 (1987-88) vs Yamaha RD 350RR (1984) vs Yamaha TW 125 (2001-03)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | XJ 600N | DT 125LC | SRX 600 | RD 350RR | TW 125 |
| Years: | 2001-04 | 1984 | 1987-88 | 1984 | 2001-03 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder | Two stroke, single cylinder, reed-valve | Four stroke, single cylinder, SOHC, 4 valve | Two stroke, parallel twin cylinder, YPVS | Four stroke. single cylinder. |
| Capacity: | 599 cc / 36.5 cu-in | 123 cc / 7.5 cu-in | 608 cc / 37.1 cu-in | 347 cc / 21.1 cu-in | 124 cc / 7.6 cu-in |
| Bore x Stroke: | 58.5 x 55.7 mm | 56 х 50 mm | 96 х 84 mm | 64 х 54 mm | 57 x 48.8 mm |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Liquid cooled | Air cooled |
| Compression Ratio: | 10:1 | 6.8:1 | 8.5:1 | 6.2 :1 | 10.0:1 |
| Induction: | 4x 28mm Mikuni BDS28 downdraft carburettors | Single 24 mm Mikuni VM26SS carburetor | 27mm Teikei 2KY27PV carburetor | 2x 26mm Mikuni slide-needle carburetor | TEIKEI Y24P/1 |
| Ignition: | Transistor | CDI | CDI | Flywheel magneto CDI | CDI |
| Starting: | Electric | Kick | Kick | Kick | Electric |
| Max Power: | 61 hp / 45 kW @ 8.500 rpm | 14 hp / 10.3 kW @ 6500 rpm | 45 hp / 34 kW @ 6500 rpm | 59 hp / 43.9 kW @ 9000 rpm | 11.8 hp / 8.6 kW @ 9000 rpm |
| Max Torque: | 33.9 lb-ft / 4.7 kgf-m @ 7000 rpm | 1.5 kgf-m / 15.2 Nm @ 6500 rpm | 4.9 kgf-m / 34 lb-ft / 46 Nm @ 5500 rpm | 40.2 Nm / 4.1 kgf-m / @ 8000 rpm | 9.7Nm / 7.2 lb-ft @ 8000m rpm |
| Transmission: | 6 Speed | 6 speed | 5 Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Chain | Chain |
| Front Suspension: | 38mm Telescopic forks, no adjustment | Telescopic Forks | 36mm Telescopic forks | 35mm Telescopic forks air assistance and variable damping | Telescopic forks |
| Rear Suspension: | Monocross monoshock adjustable for preload | Monocross | Dual Kayaba shocks 5-way adjustable for preload | Rising rate Monocross 5-way preload | Monoshock |
| Front Brakes: | 2x 298mm discs 2 piston calipers | Drum | 2x 267mm disc | 2x 260mm disc 2 piston calipers | Single 220mm disc |
| Rear Brakes: | Single 245mm disc 2 piston caliper | Drum | Single 240mm disc | Single 260mm disc 1 piston caliper | 130mm Drum |
| Front Tyre: | 110/80H17 | 2.75-21 | 110/70-17 | 90/90-18 51H | 130/80-16 |
| Rear Tyre: | 130/70H18 | 4.10-18 | 150/60-17 | 110/80-18 58H | 180/80-14 |
| Wheelbase: | 1445 mm / 56.8 in | 1360 mm / 53.5 in | 1380 mm / 54.3 in | 1385 mm / 54.5 in | 1,280 mm / 50.4 in |
| Seat Height: | 770 mm / 30.3 in | 845 mm / 33.2 in | 770 mm / 20.3 in | 790 mm / 31.1 in | 805 mm / 31.7 in |
| Dry Weight: | 193 kg / 425 lbs | 99 kg / 218 lbs | 155 kg / 341.7 lbs | 141 kg / 310.8 lbs | 106 kg / 260 lbs |
| Fuel Capacity: | 17 Litres / 4.4 US gal | 10 Litres / 2.2 gal | 15 Litres / 3.9 gal | 17 Litres / 4.5 US gal | 7 Litres / 1.9 US gal |