Lewy.Lewis said:Check (if ya can) covering the head is a plastic cover. There's 4 torx screws holding it down. Take them off and just check the rocker box bolts are not weeping oil. I know loads of people that have had this problem, I did and mine doesn't smell anymore. Not saying for sure it's that but when it was fixed it went away. I've since replaced the genny washers with soft core bronze ones that have teflon in both side. Call me a engine pimp daddy - but I'm originally a Suzuki factory mechanic and only like the nice bits in life!!