Yamaha TDR 125 (1989-92) vs Yamaha XVS 250 Drag star (2002-03) vs Matchless Silver Arrow (1929-33(specificationsfor1930m) vs Yamaha XT660R (2008) vs Yamaha RD 250LC / RZ 250LC (1980)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Matchless | Yamaha | Yamaha |
| Model: | TDR 125 | XVS 250 Drag star | Silver Arrow | XT660R | RD 250LC / RZ 250LC |
| Years: | 1989-92 | 2002-03 | 1929-33(specificationsfor1930m | 2008 | 1980 |
| Engine: | Two stroke, single cylinder | Four stroke, V-twin cylinder, SOHC, 2 valves per cylinder. | V-twin cylinder | Four stroke, single cylinder, SOHC, 4 valve | Two stroke, parallel twin |
| Capacity: | 124 cc / 7.6 cu-in | 249 cc / 15.2 cu-in | 397 cc / 24 cub in. | 659 cc/ 40.2 cu-in | 247 cc / 15.0 cu-in |
| Bore x Stroke: | 56 x 50.7 mm | 49 x 66 mm | 54 x 86 mm | 100 x 84 mm | 54 х 54 mm |
| Cooling System: | Liquid cooled | Air cooled | Air cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 6.6:1 | 10.0:1 | 5.6:1 | 10.0: 1 | 6.2 :1 |
| Ignition: | Electronic | Digital CDI | Lucas magneto, KLV-0 | TCI | CDI |
| Starting: | Electric | Electric | Kick | Electric | Kick |
| Transmission: | 6 Speed | 5 Speed | 3-Speed, Sturmey Archer gearbox (from 1932: 4-speed) | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Chain | Chain |
| Front Suspension: | 38mm Telescopic forks | Cartridge telescopic forks | Matchless centre spring girders, finger adjustment | 43 mm Telescopic forks, | Telescopic forks |
| Rear Suspension: | Monoshock with 5-way adjustable preload | Dual shock, Swingarm | Cantilever with two springs and friction dampers under saddle | Oscillating arm standard Monocross. 200mm wheel travel | Monocross |
| Front Brakes: | Single 282mm disc 2 piston caliper, | Single 282mm disc | 203 mm / 8 in. drum, interconnected | Single 298mm disc 2 piston caliper | Single 267mm disc |
| Rear Brakes: | Single 220mm disc 1 piston caliper. | 130mm Drum | 203 mm / 8 in. drum, interconnected | Single 245mm disc 1 piston caliper | Drum |
| Front Tyre: | 100/90-18 | 80/100-18 | 3.25 x 19 in. | 90/90- 21 | 3.00-18 |
| Rear Tyre: | 130/80-17 | 130/90-15 | 3.25 x 19 in. | 130/80–17 | 3.50-18 |
| Wheelbase: | 1405 mm / 55.3 in | 1530 mm / 58.9 in | 1422 mm / 56 in. | 1505 mm / 59.3 in | 1360 mm / 53.5 in |
| Ground Clearance: | 270 mm / 10.6 in | 150 mm / 5.9 in | 152 mm / 6 in. | 210 mm / 8.3 in | 165 mm / 6.4 in |
| Fuel Capacity: | 11 Litres / 2.9 US gal | 11 Litres / 2.9 US gal | 11.4 L / 3.0 US gal | 15 Litres / 3.3 US gal | 16.5 Litres / 4.3 US gal |