must be when the engine is under pressure...rode a 'R'...no leaks...its sitting on the showroom floor...no leaks...black one beside it ....no leaks....is it the TFC do they say?
The other thing that comes to mind is my 2016 when new 'leaked oil' from behind the oil tank...as have others...turns out it was grease melting and dribbling down. White spirits all around and blow dry with air gun and it was fixed. Made me frown for a while tho....maybe its something similar here.