Sticky Throttle

[nickodemon]

When the bike isn't running does the throttle open and close freely? When you open the throttle fully does it snap shut when you let go or does it go back slowly and not close fully?  Have you taken the tank off at any point while the bike as laid up (Possibly trapped a cable). If the throttle opens and closes as it should it may be the injector butterfly valves are sticking and a decent injector cleaner might free things off.