MANUFACTURED BY: JO-BU A/S MEKANISKE VERKSTED, DROBAK, NORWAY YEAR INTRODUCED: 1964 ENGINE DISPLACEMENT: 69 ccm (4.2 cu. in.) NUMBER OF CYLINDERS: 1 CYLINDER BORE: 50mm (1.96 in.) PISTON STROKE: 35mm (1.37 in.) MANUFACTURER ADVERTISED H.P.: 3.5 WEIGHT : 8.4 kg. with 40 cm bar & chain 18.5 lbs. with 15 in. bar & chain OPERATOR CONFIGURATION: One Man operation HANDLEBAR SYSTEM: Rigid CHAIN BRAKE: none CLUTCH: Centrifugal, engages at 3,500 rpm DRIVE TYPE: Direct MAGNETO TYPE: Bosch CARBURETOR: Tillotson HS-69A MAJOR REPAIR KIT: RK-23HS MINOR REPAIR KIT: DG-5HS/T OIL PUMP: Automatic, synchronized with throttle. Adjustable OPERATING RPM: 7000 FUEL TANK CAPACITY: 900 ml FUEL OIL RATIO: 20:1