Welcome! There are tons of threads to search through to get the info you need. A few things that seem to keep getting posted are the carbs-cleaned. I would also change and pump cone oil, that was something I overlooked on my past skis. Also the wear ring in the pump. There are other things, sure other will point you in the right direction. Oh yeah, do a search on the pesky grey fuel lines, ones posted have had nothing but bad luck with those, I will be getting rid of mine when I put the ski back together.
JD