Not sure what you mean by "adventure" bike. But it looks to be in decent shape. I'd start by cleaning out old grease, gunk, whatever is old and "built up". then regrease and relube all that needs it. Put on some decent brake pads (guessing those may be old and "dry"). Those had a reputation for being a nice riding bike. No firsthand experience, but remember liking that the frame looked out of the ordinary when they first came out. Best o'luck with the project!