The inlet rubbers look to be oil free so I would suggest it isnt coming from the top end of teh engine. Theres no oil near the carbs apart from, as Fazerider says, the crankcase breather.
Check inside the airbox to see if thats full of oil.
Looking at the pictures under the engine, teh oil is coming from the back ratehr than the front which ties in with teh oil under the carbs.