2009 Kawasaki Vulcan 1700 Nomad 2T Owners Manual - Page 52
2009 Kawasaki Vulcan 1700 Nomad 2T Manual
Page 52 highlights
50 GENERAL INFORMATION CAUTION California and South East Asia models only: Never fill the tank so the fuel level rises into the filler neck. If the tank is overfilled, heat may cause the fuel to expand and flow into the Evaporative Emission Control System resulting in hard starting and engine hesitation and in compliance with the emission regulation. Fuel Requirement: Fuel Type Use clean, fresh unleaded gasoline with a minimum Antiknock Index of 90. The Antiknock Index is posted on service station pumps. The octane rating of a gasoline is a measure of its resistance to detonation or "knocking." The Antiknock Index is an average of the Research Octane Number (RON) and the Motor Octane Number (MON) as shown in the table. Octane Rating Method Antiknock Index (RON + MON) 2 Minimum Rating 90 CAUTION Use minimum of 90 octane gasoline only to prevent severe engine damage.