Jawa 420 Prototype (1982)

The Jawa 420 Prototype motorcycle, produced in 1982, has a four-stroke, single-cylinder engine with a capacity of 420cc and a bore x stroke of 85 x 73 mm. It has a liquid-cooled system and a 5-speed transmission with chain final drive. The front suspension consists of hydraulic telescopic forks with a front wheel travel of 154mm and the rear suspension is a single shock with 150mm of rear wheel travel. The front brake is a single disc, while the rear brake is an expanding drum. It weighs 155 kg, has a fuel capacity of 20 L or 5.2 US gallons, and has a top speed of around 130 km/h or 80 mph.


Technical specifications:

Make Model: Jawa 420 Prototype

Year: 1982


Engine: Four stroke, single cylinder, SOHC, 4 valves per cylinder.
Capacity: 420 cc / 25.6 cu in
Bore x Stroke: 85 x 73 mm
Cooling System: Liquid cooled
Transmission: 5 Speed
Final Drive: Chain
Front Suspension: Hydraulic telescopic forks
Front Wheel Travel: 154 mm / 6.1″
Rear Suspension: Single shock
Rear Wheel travel: 150 mm / 5.9″
Front Brakes: Single disc
Rear Brakes: Expanding drum
Dry Weight: 155 kg / 342 bls
Fuel Capacity: 20 L / 5.2 US gal

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