Mine started leaking around 4K miles. Dealer changed the "O" ring. Then changed the plug and "O" ring. Then changed the "O" ring and added sealer. I changed the plug and went to the closest thicker US equivalent "O" ring. Still seeping! The surface on the cover where the "O" rings seals is a bit rough, maybe porous. And Suzuki won't do anything about the cover. I'm out of warranty now anyway. Guess it could just be called another feature of the bike.
The grass may look greener, but there is probably more POOP in it!