Cylinders Two Stroke/Cycle Four Displacement 617 cc (37.7 cu in) Bore 76mm (2.99 in) Compression Ratio 10.3 Speed (fast idle), no load 3550 rpm Speed (slow idle), no load 1450 rpm Lubrication Full pressure Oil Filter Full flow (replaceable) Air Cleaner Replaceable element with pre-cleaner Cooling System Liquid-cooled Fuel System Fuel See Filling Fuel Tank in the Service - Miscellaneous section. Fuel Filter Replaceable - paper element Fuel Pump Electric Fuel Delivery ·425 Carburetor ·445 Fuel injected Electrical System Type 0.8kW (12 volt Electric Start) Charging System Alternator, 20 amp Battery 340 CCA (cold cranking amps) Capacities Fuel Tank 24.6L (6.5 Gal) 129