I got a 2002 mountain cat 800 and fuel spews out from the top of the fuel pump. I’m thinking I need a rebuild kit but there isn’t a way to get the top apart... do they make a rebuild kit for it or do you have to get a whole new assembly?
If it is a Mikuni then yes you can buy a new assembly or a rebuild kit. My personal choice is to just buy a new pump then the rebuilds but many people here have used the rebuild kits without issues. Just make sure it is a true mikuni rebuild kit and not some off brand junk if you go that route.
Is it EFI or Carbed? That will determine if you can rebuild it or not.