Junak WB1

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Junak-wb1-1959-1965-1.jpg
Junak WB1
Manufacturer
Production 1959
Class Classic
Engine
Four stroke, single cylinder, OHV, air-cooled
Bore / Stroke 76.2mm x 76.2mm
Compression ratio 7.0:1
Horsepower 19.04 HP (14.2 KW) @ 6000RPM
Torque 19.92 ft/lbs (27.0 Nm) @ 3800RPM
Fuel System Carburetor
Transmission Gear box: 4-Speed

Final Drive: Chain

Clutch: Wet Multi-plate
Suspension Front: Fork with coil springs telescopic shock absorbers
Rear: ndependent rear wheel suspension on single wishbone, cooperating with 7- leaf spring positioned transversely
Brakes Front: Full hub width, of expander shoe type, hand operated
Rear: Full hub width, of expander shoe type, foot operated
Wheelbase 79.09 inches (2009 mm)
Length 86.42 inches (2195 mm)
Width 58.7 inches (1491 mm)
Seat Height 29.69 inches (754 mm)
Weight 327.0 kg (wet)
Manuals Service Manual


The Junak WB1 was a Four stroke, single cylinder, OHV, air-cooled Classic motorcycle produced by Junak in 1959. Max torque was 19.92 ft/lbs (27.0 Nm) @ 3800 RPM. Claimed horsepower was 19.04 HP (14.2 KW) @ 6000 RPM.

Engine[edit]

A 76.2mm bore x 76.2mm stroke result in a displacement of just 349.0 cubic centimeters.

Drive[edit]

The bike has a 4-Speed transmission. Power was moderated via the Wet Multi-plate.

Chassis[edit]

Stopping was achieved via Full hub width, of expander shoe type, hand operated in the front and a Full hub width, of expander shoe type, foot operated in the rear. The front suspension was a Fork with coil springs telescopic shock absorbers while the rear was equipped with a ndependent rear wheel suspension on single wishbone, cooperating with 7- leaf spring positioned transversely. The wheelbase was 79.09 inches (2009 mm) long.

1959 - 1965 Junak WB1[edit]

1959 - 1965 Junak WB1 1959 - 1965 Junak WB1

Szczecin Motorcycle Factory developed and started to produce in 1959 a M07 with passenger side loader , branded as the WB1 and was later followed by the WB3. In essence these two motorcycles are the same - the WB1 is based on the M07 and the WB2 on the later model M10.