The Jawa 638 is a two-stroke parallel-twin motorcycle with a 343.4 cc engine producing 23.5 hp at 5250 rpm and 31.4 Nm of torque at 4750 rpm. It uses a Jikov 28-29 CE horizontal carburetor and a Magneto VAPE A67 contactless ignition.
The motorcycle has a four-speed transmission and a chain final drive. It features a tubular, double, closed frame, hydraulic telescopic fork front suspension, and swingarm rear suspension with hydraulic telescopic in suspension units. The front and rear brakes are a hydraulic control A265 mm disc and a mechanical control A165 mm drum respectively.
The Jawa 638 has steel wheels with a deepened profile and multi-spokes. It has a length of 2100 mm, a width of 780 mm, and a height of 1160 mm with a ground clearance of 120 mm and seat height of 820 mm. It has a dry weight of 149 kg and a wet weight of 162 kg with a fuel capacity of 17 L and fuel reserve of 2.8 L. The motorcycle has a GVWR of 342 kg and a turning radius of 3.5 meters. It was produced in 1994.
Technical specifications:
Make Model: Jawa 638
| Year | 1994 |
|---|---|
| Engine | Two stroke, parallel twin |
| Capacity | 343.4 cc / 21.0 cu in |
| Bore x Stroke | 58 x 65 mm |
| Compression Ratio | 9.8:1 |
| Cooling System | Air cooled |
| Induction | Jikov 28-29 CE horizontal carburetor, slide type |
| Ignition | Magneto VAPE A67 contactless |
| Battery | 12V, 6Ah |
| Starting | Kick |
| Max Power | 17.2 kW / 23.5 hp @ 5250 rpm |
| Max Torque | 31.4 Nm / 3.2 kgf-m / 23.2 ft.lb @ 4750 rpm |
| Clutch | Multi disc in oil bath |
| Transmission | 4 Speed |
| Final Drive | Chain |
| Gear Ratios | 1st 14.50 / 2nd 8.60 / 3rd 6.10 / 4th 4:96:1 |
| Frame | Tubular, double, closed |
| Front Suspension | Hydraulic telescopic fork, steel spiral springs |
| Front Wheel Travel | 150 mm / 5.9 in |
| Rear Suspension | Swingarm, hydraulic telescopic in suspension units, spiral springs |
| Rear Wheel Travel | 80 mm / 3.1 in |
| Front Brakes | ~A265 mm Disc, hydraulic control |
| Rear Brakes | ~A165 mm Drum, mechanical control |
| Wheels | Steel, deepened profile, multi-spokes |
| Front Wheel | 2.15 B x 18″ |
| Rear Tyre | 2.15 B x 18″ |
| Dimensions | Length: 2100 mm / 82.7 in Width: 780 mm / 30.7 in Height: 1160 mm / 45.7 in |
| Wheelbase | 1370 mm / 53.9 in |
| Ground Clearance | 120 mm / 4.7 in |
| Seat Height | 820 mm / 32.3 in |
| Turning Radius | 3.5 m / 11.5 ft |
| Dry Weight | 149 kg / 328 lbs |
| Wet Weight | 162 kg / 357 lbs |
| GVWR | 342 kg / 754 lbs |
| Fuel Capacity | 17 L / 4.5 US gal |
| Fuel Reserve | 2.8 L / 0.74 US gal |
