Yamaha TZR 250 (1988) vs Ducati 175TS Turismo Speciale (1962-65) vs Ducati 998 S Bostrom Replica (2002) vs Yamaha IT 425 (1980) vs Yamaha XV 1900 Roadliner S (2014-15)
Comparison technical specifications
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| Make: | Yamaha | Ducati | Ducati | Yamaha | Yamaha |
| Model: | TZR 250 | 175TS Turismo Speciale | 998 S Bostrom Replica | IT 425 | XV 1900 Roadliner S |
| Years: | 1988 | 1962-65 | 2002 | 1980 | 2014-15 |
| Engine: | Two stroke, parallel twin cylinders, read valve, | Four stroke, single cylinder, SOHC, shaft and bevel gear driven, 2 valves per cylinder | Four stroke, 90° “L” twin cylinder, DOHC, desmodromic 4 valve per cylinder, belt driven | Two stroke, single cylinder, read valve | Four stroke, pushrod 48° V-Twin, OHV, 2 valves per cylinder |
| Capacity: | 249 cc / 15.2 cu-in | 174.5 cc / 10.6 cu in | 998 cc / 60.9 cu in | 425 cc / 25.9 cu-in | 1854 cc / 113 cu-in |
| Bore x Stroke: | 56.4 x 50 mm | 62 x 57.8 mm | 100 x 63.5 mm | 85 x 75 mm | 100 х 118 mm |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled | Air cooled | Air cooled |
| Compression Ratio: | 5.9:1 | 7:1 | 11.4:1 | 7.3;1 | 9.5:1 |
| Induction: | 2x Mikuni TM28SS carburetor | Dell'Orto MB22B carburetor | Weber Marelli CPU 5.9M, 54mm throttle bodies, electronic fuel injection | 38mm VM38SS Mikuni carburetor | Twin-bore electronic fuel injection, 43mm throttle bodies and throttle position sensor |
| Ignition: | CDI | 6V 40W generator, points and coil | Digital CDI | CDI | Digital TCI |
| Starting: | Kick | Kick | Electric | Kick | Electric |
| Max Power: | 50 hp / 36.4 kW @ 10000 rpm | 8.2 kW / 11 hp @ 7500 rpm | 100 kW / 136 hp @ 10200 rpm | 36.9 hp / 27.5 kW @ 6000 rpm (rear tyre | 98.6 hp / 72.0 kW @ 4250 rpm |
| Transmission: | 6 speed | 4 Speed | 6 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | 3.066:1 | Chain | Chain | Belt |
| Front Suspension: | Telescopic fork adjustable preload | Hydraulic telescopic fork, Ducati | Öhlins upside down fork with 43 mm of condition pipe diameter, TiN coating | 43mm Telescopic adjustable forks, 300mm wheel travel | 46mm telescopic forks, |
| Rear Suspension: | Coil and gas spring preload 9-way preload position | Swingarm, dual shocks, 3-way adjustable | A arm rocker with progressively working Öhlins central shock strut | Mono shock, adjustable spring preload and rebound damping, 300mm wheel travel | Single shock, link-type, |
| Front Brakes: | Single 320mm discs 2 piston calipers | Drum, full aluminium, 158 mm | 2 x 320 mm Discs, 4 piston calipers | Drum | 2x 298mm discs 4 piston calipers |
| Rear Brakes: | Single 210mm disc 1 piston caliper | Drum, full aluminium, 136 mm | Single 220 mm disc, 2 piston caliper | Drum | Single 320mm disc 4 piston caliper |
| Front Tyre: | 100/80-17 | 2.50 -18 | 120/70 ZR17 | 3.00 -21 | 130/70 -18 |
| Rear Tyre: | 120/80-17 | 2.75 -18 | 190/50 ZR17 | 150/80 -18 | 190/60 -17 |
| Wheelbase: | 1375 mm / 54.1 in | 1310 mm / 51.6 in | 1410 mm / 55.5 in | 1430 mm / 56.2 in | 1715 mm / 67.5 in |
| Dry Weight: | 128 kg / 282.1 lbs | 98.5 kg / 108 lbs | 187 kg / 412 lbs | 111 kg / 244.7 in | 340 kg / 748 lbs |
| Fuel Capacity: | 16 liters / 4.2 US gal | 17 L / 4.5 US gal / 3.7 Imp gal | 17 Litres / 4.5 US gal / 3.7 Imp gal | 13.6 Litres / 3.5 US gal | 17 Litres / 4.4 us gal |