2x Jawa 350 type 633 Unified series "Bison"

before renovation
Jawa 250/623 (350/633) Bison is a motorcycle developed by Jawa, manufactured in 1970-1972. The predecessor was the Jawa 250/623 UŘ.
It is a modified motorcycle unified series. Edited by academic architect Jan Tatoušek. Based on the mask of the headlight and the tall tank, it was given the nickname Bizon due to its characteristic appearance. For the first time in a Jawa motorcycle, plastic is used to a greater extent (front grille and seat). The headlight has a concave glass shape to swirl air in front of the headlight and prevent insects from settling on the glass. The handlebars are attached to the vertical beams and can be adjusted in height. Separate oilmaster oil lubrication is used for some products.
The frame is rocker with underslung motor. Its unusual shape made it possible to lift the rear fork only 90 mm. The front fork tubes are fastened in the eyes below the tank level, with a lift of 125mm. The wide frame sidewalls make it difficult to access the carburetor, making it difficult to cross and adjust. To reduce production costs, the model was only produced in red or yellow.
Manufacturer: Jawa
Also called: Bison
Parent company: Jawa
Production: 1970-1972
Preceded by: Jawa 350/633 UŘ
Successor: Jawa 350/634
Engine: Two-stroke, air-cooled in-line two-cylinder engine with a displacement of 343 cm³
Bore: 58 mm
Stroke: 65 mm
Filling: carburettor Jikov
Power: 16 kW (21 hp) at 5000 rpm.
Gearbox: four-speed, secondary chain drive
Suspension: stroke 125 mm front, 90 mm rear
Brakes: front: drum, rear: drum
Tires: front 3.25x18, rear 3.50x18
Dimensions: 1890mm (l), 640mm (w), 1020mm (h)
Tank capacity: 17 L
Frame: cradle
Dry weight: 149 kg
Curb weight: 158 kg
Maximum speed: 128 km / h
Fuel consumption: 4.0 l / 100km

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