Tell you never road a Harley or Triumph!
'02's and '03's are known for the rear head to leak a tad (literally). The process Honda used, missed a millimeter or two of sealant on the top of the head at the back. On long trips and/or in the summer it's worse because the oil gets so thin after it's hot. The fix is to pull the top and reseal.I just wipe it every few months.