REST EASY, THIS IS A 5 MINUTE FIX
I came across this forum, looking for the same answer as you. I know this is too late to help you, but it may help someone else searching the same problem.
On the 'drivers side' (use a car as reference) on the engine, there is a cover with a large round plate. On the bottom of the cover, There is a 12mm bolt head sticking out. Remove the bolt head, water and grease should flow out. Make sure you put something down, as this will stain concrete, with the bolt head out, drive around a bit . Put the drain plug back in and go at it!
To help keep this from happening again, If you look on either end of that cover, you see plastic vent pipes that run under the front wheel. I cut a piece of rag, and stuck over the opening of the pipe and secured it with a hair band...
I Absolutely Love this Bike!
