These very high quality Yamaha carburetor rebuild kits from K&L are made by Japanese OEM's and contain all the necessary components to rebuild one carburetor.  They work on the 1984-1989 Yamaha XT600 original equipment carburetors.  All kits include the following components:

• Top cover gasket
• Float bowl o-ring
• Float valve seat
• Float valve seat o-ring
  
• Float valve needle
• Other o-rings as pictured

These are the exact same replacement parts made for the OEM's in Japan but at a fraction of the cost.