I have done 62000 on my Husky so far, 100 000km on my XT600E, 160 000 on one of my GT750's, 55 000 on a KH500E, and 74 000 on one of my aircooled RD350's.
Just there you have 450 000kms, and I had many, many more bikes.
My 21 months in bike squad must also be good for a heck of kilometers...