| MODEL | JAWA 644 CHOPPER 1994 |
| Year | 1994 |
| Engine Type | Two stroke, parallel twin |
| Displacement / Capacity | 343.4 cc / 21.0 cu in |
| Bore X Stroke | 58 x 65 mm |
| Compression Ratio | 10.2:1 |
| Cooling System | Air cooled |
| Max Power | 18 kW / 25 hp @ 5500 rpm |
| Max Torque | 33 Nm / 3.4 kgf-m / 25 ft.lb @ 5250 rpm |
| Ignition | Magneto VAPE A67 contactless |
| Induction | Jikov 28-29 CE horizontal slide carburettor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4 Speed |
| Clutch | Multi disc in oil bath |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Tubular, double, closed |
| Front Suspension | Hydraulic telescopic fork, steel spiral springs |
| Rear Suspension | Swingarm, hydraulic telescopic suspension units, spiral springs |
| Front Brakes | 265 mm disc, hydraulic control |
| Rear Brakes | 165 mm drum, mechanical control |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 147 kg / 322 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 90/100-17 |
| Rear Tyre | 100/90-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 15 Litres / 4.0 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 644 Chopper was a 1994 factory custom built on the Type 640 350 cc two-stroke twin, with a slightly higher compression ratio and a little more power than the Style models. It runs a 90/100-17 front and 100/90-18 rear tyre and a smaller 15 litre tank.
