Fuel pump overhaul kit X1 & S3 injection all you need to fix your X1 or S3 injection fuel pump 

TM-P0166.K    Buel XB 9/12 03-09 Fuel Pump Pressure Regulator 

TM-P0133.K    Buell S3 X1 Seal electrical fitting fuel  

TM-P0134.K    Buell S3, X1 seal Fuel Pump fitting Oem P0134.K   

TM501    Buell X1, S3 injection fuel filter   

TM-P0164.K    Buell XB9/12 Seal fuel pump outlet 2004-2010    

TM-P0176.K    Fuel tank seal washers X1 - S3 inj    

TM005    Replacement fuel pump for Buell 1999 - 2009   

2401-0560    STEPLESS EAR CLAMP 12.0-14,5 mm sold a piece    

if you want to ad a low level fuel sensor please see link  Lowlevelfuelsensor