THE KIT WILL NOT WORK FOR THE  KEIHIN FCR-MX MODEL. For the FCR-MX conversion kit see ebay item# 272786263816 KEIHIN FCR Carburetor conversion kit for installation on Suzuki Drz400 Fits Keihin FCR Carburetors 35mm - 41mm With Removable Airbox Adapter For the FCR-MX conversion kit see item:  Kit Includes: Aluminum Airbox Adapter Stainless hardware for adapter Intake Collar OCEMN Jet Needle (OCEMP available for altitude riding) 2 pilot jets (sz45, sz48) 3 main jets (sz150, sz155, sz160) (if other sizes jet sizes are needed please send a message with your request) The Vacuum Port Nipple is needed if using the OEM Petcock, it is listed in my other items