Velocette GTP (1930-46) vs Triumph Street Triple 675 (2008) vs Laverda Jota 1000 (1978-80) vs Triumph 6T Thunderbird (1954-62) vs Yamaha XMAX 125 (2012-13) vs Yamaha XS 400R Seca (1982-) vs Ducati Streetfighter (2011)
Comparison technical specifications
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| Make: | Velocette | Triumph | Laverda | Triumph | Yamaha | Yamaha | Ducati |
| Model: | GTP | Street Triple 675 | Jota 1000 | 6T Thunderbird | XMAX 125 | XS 400R Seca | Streetfighter |
| Years: | 1930-46 | 2008 | 1978-80 | 1954-62 | 2012-13 | 1982- | 2011 |
| Engine: | Two-stroke, Single cylinder | Four stroke, in-line 3-cylinder, DOHC, 12 valve | Four stroke, transverse three cylinder, DOHC, 2 valve per cylinder. | Four stroke, vertical twin, OHV | Four stroke, single cylinder | Four stroke, parallel twin, DOHC, 2 valves per cylinder | Four stroke, 90° “L” twin cylinder, DOHC, desmodromic 4 valves per cylinder |
| Capacity: | 249 cc / 15.2 cub in | 675 cc / 41.19 cu-in | 980 cc / 59.8 cu-in | 649 cc / 40.0 cu in | 124 cc / 7.6 cu-in | 399 cc / 24.3 cu-in | 1099 cc / 67.1 cu in |
| Bore x Stroke: | 63 x 80 mm | 74 x 52.3 mm | 75 x 74 mm | 71 x 82 mm | 52 x 58.6 mm | 69.0 x 53.4 mm | 104 x 64.7 mm |
| Compression Ratio: | 6.5:1 | 12.65:1 | 10.0:1 | 8.5:1 (Export), 7.0:1 (UK) | 11.2:1 | 9.7:1 | 12.4:1 |
| Cooling System: | Air cooled | Liquid-cooled | Air cooled | Air cooled | Liquid cooled | Air cooled | Liquid cooled |
| Ignition: | Coil in conjunction with Miller | Digital - inductive type | Bosch electronic | Lucas RM14 | Electronic ECU | Transistorized | Digital CDI |
| Starting: | Kick start | Electric | Electric | Kick | Electric | Electric | Electric |
| Transmission: | Early models: 3 Speed, hand operated Later models: 4 Speed, foot operated | 6 Speed | 5 Speed | 4-Speed constant mesh | Automatic | 6 Speed | 6 Speed |
| Final Drive: | Chain | O ring chain | Chain | Chain, 101 links | Belt | Chain | Chain |
| Front Suspension: | Webb fork with shock absorber and steering damper | 41mm Kayaba telescopic upside down forks | Coils springs | Telescopic fork, hydraulic damping | Hydraulic telescopic fork | Hydraulic telescopic forks | Showa 43mm fully adjustable upside-down fork |
| Rear Suspension: | None, spring loaded seat | Kayaba monoshock, adjustable preload | Dual shock absorbers, 5-way adjustable coil springs | Swingarm, 2 Griling dampers | Hydraulic unit swing | Monocross system with single coil sprung, gas/oil damped shock, pre-load adjustable | Progressive linkage with fully adjustable Showa monoshock. Aluminium single-sided swingarm |
| Front Brakes: | 6 in. drum, internal expanding | 2 x 308 mm Discs, Nissin 2 piston sliding calipers | 2x 280mm discs 2 piston calipers | SLS drum, 8 in | Single 267mm disc | 2x discs | 2x 330 mm Semi-floating discs, radially mounted Brembo Monobloc calipers 4-piston, 2-pad. |
| Rear Brakes: | 6 in. drum, internal expanding | Single 220 mm disc, 1 piston caliper | Single 280mm disc 1 piston caliper | SLS drum, 7 in | Single 240mm disc | Drum | Single 245 mm disc, 2 piston caliper |
| Fuel Capacity: | 6.6 L / 1.75 US gal | 17.4 Litres / 4.6 US gal / 3.8 Imp gal | 20.5 Litres / 5.4 US gal | 13.6 L / 3.6 US gal / 3.0 Imp gal (US), 18 L / 4.8 US gal / 4.0 Imp gal (UK and export) | 12.5 Litres / 3.3 gal | 18 Litres / 4.7 US gal | 16.5 Litres / 4.4 US gal / 3.6 Imp gal |
| Dry Weight: | 101 kg / 222 lbs (light set included) | 167 kg / 368 lbs | 238 kg / 524.7 lbs | 179 kg / 395 lbs | 153 kg / 337.3 lbs | 169 kg / 372.9 lbs | 169 kg / 373 lbs |