Aprilia RS4 125 GP Replica (2018) vs Yamaha TZR 250 (1988)
Comparison technical specifications
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| Make: | Aprilia | Yamaha |
| Model: | RS4 125 GP Replica | TZR 250 |
| Years: | 2018 | 1988 |
| Engine: | Four stroke, single cylinder, DOHC, 4 valves | Two stroke, parallel twin cylinders, read valve, |
| Capacity: | 124.8 cc / 7.6 cu in | 249 cc / 15.2 cu-in |
| Bore x Stroke: | 58 X 47 mm | 56.4 x 50 mm |
| Cooling System: | Liquid cooled | Liquid cooled |
| Compression Ratio: | 12.5 ± 0.5:1 | 5.9:1 |
| Induction: | Magneti Marelli M3G ø 32mm ECU | 2x Mikuni TM28SS carburetor |
| Ignition: | Electronic with CDI capacity discharge | CDI |
| Starting: | Electric | Kick |
| Max Power: | 11.7 kW / 16 hp @ 10500 rpm | 50 hp / 36.4 kW @ 10000 rpm |
| Max Torque: | 11 Nm / 1.12 kgf-m / 8.1 ft/lb @ 8500 rpm | 35.5 Nm / 26.2 lb-ft @ 9750 rpm |
| Transmission: | 6 Speed | 6 speed |
| Final Drive: | Chain: 60/13 (4.61) | Chain |
| Front Suspension: | Ø41 mm Upside down fork | Telescopic fork adjustable preload |
| Front Wheel Travel: | 110 mm / 4.3 in | 140 mm / 5.5 in |
| Rear Suspension: | Asymmetric swingarm with monoshock | Coil and gas spring preload 9-way preload position |
| Rear Wheel Travel: | 130 mm / 5.1 in | 100 m / 3.9 in |
| Front Brakes: | Single 300 mm disc, 4 piston caliper | Single 320mm discs 2 piston calipers |
| Rear Brakes: | Single 218 mm disc, 1 piston caliper | Single 210mm disc 1 piston caliper |
| Front Tyre: | 110/80 17 | 100/80-17 |
| Rear Tyre: | 130/70 17 | 120/80-17 |
| Dimensions: | Length: 1953 mm / 76.8 in Width: 760 mm / 29.9 in Height: 1135 mm / 44.6 in | Length 2005 mm / 78.9 in Width 660 mm / 25.9 in |
| Wheelbase: | 1353 mm / 53.2 in | 1375 mm / 54.1 in |
| Seat Height: | 820 mm / 32.3 in | 760 mm / 29.9in |
| Dry Weight: | 122 kg / 269 lbs | 128 kg / 282.1 lbs |
| Fuel Capacity: | 14.5 Litres / 3.8 US gal | 16 liters / 4.2 US gal |