2003-2006 Kawasaki KFX400 service manual, Page 42Get this manual
GENERAL INFORMATION
FUEL (For the other countries)
Use unleaded gasoline that is graded 91 octane or higher by the Research Method
ENGINE OIL (For USA)
SUZUKI recommends the use of SUZUKI PERFORMANCE MOTOR OIL or oils that meet API service classifications SF or SG and that have viscosity rating of SAE 10W-40If engine oil with rating of SAE 10W-40 is not available, select an alternative according to the chart
ENGINE OIL (For the other countries)