Jawa 640 Sport (1995) vs Aprilia RS 125R Extrema (1994-95)
Comparison technical specifications
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| Make: | Jawa | Aprilia |
| Model: | 640 Sport | RS 125R Extrema |
| Years: | 1995 | 1994-95 |
| Engine: | Two stroke, parallel twin | Single cylinder, two stroke, reed valves induction |
| Capacity: | 343.4 cc / 21.0 cu in | 125 cc / 7.6 cu in |
| Bore x Stroke: | 58 x 65 mm | 54 x 54.5mm |
| Compression Ratio: | 9.8:1 | 14.5:1 |
| Cooling System: | Air cooled | Liquid cooled |
| Induction: | Jikov 28-29 CE horizontal carburetor, slide type | Dell'Orto VHSB 34LD |
| Ignition: | Magneto VAPE A67 contactless | Electronic |
| Starting: | Kick | Electric |
| Max Power: | 17.2 kW / 23.5 hp @ 5250 rpm | 24.8 kW / 34 hp @ 11000 rpm |
| Max Torque: | 31.4 Nm / 3.2 kgf-m / 23.2 ft.lb @ 4750 rpm | 25 Nm / 2.5 kgf-m / 18.4 lb-ft @ 9000 rpm |
| Transmission: | 4 Speed | 6 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Hydraulic telescopic fork, steel spiral springs | Upside-down forks, Ø 40mm |
| Front Wheel Travel: | 150 mm / 5.9 in | 120 mm / 4.7 in |
| Rear Suspension: | Swingarm, hydraulic telescopic in suspension units, spiral springs | Monoshock |
| Rear Wheel Travel: | 80 mm / 3.1 in | 120 mm / 4.7 in |
| Front Brakes: | Ø265 mm Disc, hydraulic control | Single 320 mm discs, 4 piston caliper |
| Rear Brakes: | Ø165 mm Drum, mechanical control | Single 240 mm disc, 2 piston caliper |
| Rear Tyre: | 2.15 B x 18" | 150/60-17 |
| Dry Weight: | 149 kg / 328 lbs | 115 kg / 254 lbs |
| Wet Weight: | 162 kg / 357 lbs | 142 kg / 313 lbs |
| Fuel Capacity: | 17 L / 4.5 US gal | 11.5 L / 3.0 US gal |