Kits galore available for the Honda. Low cost to high cost carbon fibre.
A friend of mine has a 450x here in Dubai which he used for the Transoriental and the previous dakar in South America (not this year).
Honda Europe has a very good succes rate (Challenge 75 kit) I believe. The bike only had oil changes in South America, no top end rebuild or anything else. I think it was a top 40 finish. I will get some photos soon.
PS 690 for sales for 20.000 USD 1 year old.