Jawa 644 Chopper (1994) vs Aprilia AF1 125 Project 108 Replica (1988)
Comparison technical specifications
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| Make: | Jawa | Aprilia |
| Model: | 644 Chopper | AF1 125 Project 108 Replica |
| Years: | 1994 | 1988 |
| Engine: | Two stroke, parallel twin | Two stroke, single cylinder, light alloy, barrel with Gilnisil coating |
| Capacity: | 343.4 cc / 21.0 cu in | 124.7 cc / 7.6 cu in |
| Bore x Stroke: | 58 x 65 mm | 54 x 54.5 mm |
| Compression Ratio: | 10.2:1 | 15.5:1 |
| Cooling System: | Air cooled | Liquid cooled |
| Induction: | Jikov 28-29 CE horizontal carburetor, slide type | Dell'Orto carburetor, Ø 28 mm |
| Ignition: | Magneto VAPE A67 contactless | Electronic |
| Starting: | Kick | Electric |
| Max Power: | 18 kW / 25 hp @ 5500 rpm | 21.6 kW / 29 hp @10500 rpm |
| Max Torque: | 33 Nm / 3.4 kgf-m / 25 ft.lb @ 5250 rpm | 18.6 Nm / 1.9 kgf-m / 13.7 lb-ft @ 10000 rpm |
| Transmission: | 4 Speed | 6 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Hydraulic telescopic fork, steel spiral springs | Telescopic fork, Ø 40 mm, 4-way anti-drive adjustable |
| Rear Suspension: | Swingarm, hydraulic telescopic in suspension units, spiral springs | Aprilia progressive mono shock system |
| Rear Wheel Travel: | 80 mm / 3.1 in | 120 mm / 4.7 in |
| Front Brakes: | Ø265 mm Disc, hydraulic control | Single Ø 320 mm disc, 4 piston caliper |
| Rear Brakes: | Ø165 mm Drum, mechanical control | Single Ø 240mm disc, 2 piston caliper |
| Front Tyre: | 90/100-17" | 100/80-17 |
| Rear Tyre: | 100/90-18" | 120/80-17 |
| Dry Weight: | 147 kg / 322 lbs | 120 kg / 265 lbs |
| Fuel Capacity: | 15 L / 4.0 US gal | 20 L / 5.3 US gal |