MANUFACTURED BY: JONSEREDS FABRIKERS AB PARTILLE, SWEDEN SERIES OR ASSEMBLY NUMBER: YEAR INTRODUCED: 1957 YEAR DISCONTINUED: 1960 ENGINE DISPLACEMENT: 62cc (3.78 cu. in.) NUMBER OF CYLINDERS: 1 CYLINDER BORE: 45.45mm (1.75 in.) PISTON STROKE: 40mm (1.57 in.) CYLINDER TYPE: Chrome plated aluminum INTAKE METHOD: Rotary valve MANUFACTURER ADVERTISED H.P.: 1.69kw @ 5100 rpm WEIGHT: 9.47kg (20.87 lbs.) OPERATOR CONFIGURATION: One Man operation HANDLEBAR SYSTEM: Rigid CHAIN BRAKE: none CLUTCH: Centrifugal DRIVE TYPE: Gear reduction CONSTRUCTION: Die cast magnesium MAGNETO TYPE: Stefa CARBURETOR: Injector MAJOR REPAIR KIT: MINOR REPAIR KIT: AIR FILTER SYSTEM: Metallic screen STARTER TYPE: Jonsered automatic rewind OIL PUMP: Manual MAXIMUM ENGINE RPM: 6,800 IDLE RPM: IGNITION TIMING: BREAKER POINT SETTING: 0.4mm FLYWHEEL/COIL AIR GAP: SPARK PLUG TYPE: SPARK PLUG GAP: 0.5mm to 0.6mm (0.020 in. to 0.024 in.) CRANKSHAFT MAIN BEARINGS: Ball FUEL TANK CAPACITY: 1.24 litres (42 oz.) FUEL OIL RATIO: 10:1 RECOMMENDED FUEL OCTANE: Regular MIX OIL SPECIFICATION: SAE 50 or SAE 60 CHAIN PITCH: 12.7mm (.500 in.) 1/2" CHAIN TYPE: BAR MOUNT PATTERN: SHORTEST GUIDE BAR SUPPLIED: 48 c, (19 in.) LONGEST GUIDE BAR SUPPLIED: COLOUR SCHEME: Green