There’s no way to accurately portray how much the maintainance cost of the BMW F 450 GS will be, as it is yet to be launched. However, BMW bikes have a reputation for being a little pricey to live with, even the smaller 310s. You shouldn’t expect the F 450 GS to be as easy on the wallet as its peers, like the Royal Enfield Himalayan 450, KTM 390 Adventure models or even the Honda NX500.
We recommend you wait a while before you buy the F 450 GS so that you can see thorough reviews of the bike. Also, you can speak to actual owners of the machine, and then make an informed decision.