Dealer just completed warranty on the 07 RSV replacing the cylinder head gaskets front and rear. I have found what appears to be a vacumm hose disconnected beneath the fuel tank. I can't tell where the rear connects, however the forward end of tube is long enough to reach the air cleaners and perhaps more. Idle is not smoothe and there is a vibration getting up to higher rpm's. Once you reach mid to high rpm's it smoothes out. Mechanic stated it is a vent tube and stuffed it back under the tank. The end of the hose physically is expanded and looks to have had a clamp on it originally He did a carb sync and it seems only slightly better. Next step is to remove the tank myself and determine where the hose originates on the connected end and go from there. I don't see specifics on the vent tubes in the service manual, however I may be missing something.
Note: The checked the valve adjustment at this time as well, 30K, and stated all were within spec.
It was running great before their having worked on it. Appreciate any suggestions/guidance here.