2007-2009 Kawasaki KFX50 service manual, Page 58Get this manual
3INSPECTIONADJUSTMENT FUEL HOSES AND CONNECTIONS INSPECTION
Check the fuel hosesReplace the fuel hose if any fraying, leaks, cracks, bulges, or ozonic cracks are noticedCheck that the hoses are securely connected and clamps are installed correctlyWhen installing the fuel hoses, avoid sharp bending, kinking, flattening or twisting, and route the fuel hoses with minimum of bending so that the fuel flow will not be obstructedReplace the hose if it has been sharply bent or kinked