My race-bike sits for about 3-months without use over winter. In heated garage. More than once, I forgot to drain float-bowls beforehand and carbs end up needing complete restoration. First time, I missed 1st race of season as bike ran for 1-lap and died. No amount of spraying with carb-cleaner spray in pits was able to revive it. Next season, I sent them off to ducatiman to be sure they're fully functional.
Check out these seals. They've upgraded materials to viton and fluoroelastomers to better deal with modern ethanol petrol:
https://www.litetek.co/Carb_Kit_Kawa...1986-2012.html