I was going through my S9 after setting for the winter and when i take it out if you slowly turn the throttle it wll eventually stall but start right back up. I have also noticed at full throttle sometimes it backs off for a second then accelerates. i only have 1725km's on this scooter. Today I took off the air cleaner and I noticed oil between the carb and the air cleaner. I don't know if the carb just needs adjusting or if there is another problem. I took it for a long ride today and it performed beautiful but when you stop and start to accelerate it bogs down. any thoughts. Thank you