I am , I believe, chasing a coolant leak on my 09 700 Transalp. When it gets a bit warm , from standing in traffic, it starts to exhibit that sweet smell associated with antifreeze. So I top up the expansion tank, AGAIN & carry on. No VISIBLE leak or drip so its probably a very small leak hitting something hot & evaporating. Is there anywhere they are known to leak from ? On the move, even at 80 MPH cruising , it controls at 75 degrees. Fan cuts in at 103. Suggestions please gentlemen & ladies !