AFAIK most modern carb kits use, "Viton" synthetic rubber parts and not the older butyl so I doubt even my 99 will be affected in normal use. I will be keeping an eye on it of course but I also suspect my the use of Redex will aid in reducing any problems. Even though it's not advertised as such I've never had stale-fuel problems when I have winterized my bike SV and using Redex or Carplan fuel cleaner.
Time will tell
