Jawa 638 (1994)

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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

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