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Engine Type: 2 cyl

Displacement: 30.4 ci (498 cc)

Bore x Stroke: 65mm x 75 mm (2.56 x 2.95 in)

Prop Shaft Horsepower: 25 hp at 5500 rpm

Full Throttle RPM Range: 5000 - 6000

Alternator Output at W.O.T.: 13AMP with Rectifier Regulator

Compression Ratio: 9.4:1

Fuel Induction System: SOHC

Weight:76kg (168lbs) - F25LEHB = 82kg (181 lbs)

Recommended Fuel: Octane 87

Recommended Engine Oil: Yamalube® 4M (See owner's manual)

Recommended Fuel Filtration: Yamaha Mini 10-Micron Fuel/Water Separating Filter (external)