Yeah, needs to be Euro3 or better (generally 2007+, e.g. FZ6 S2) to enter current congestion charge zone from April 2019 - otherwise a £12/day fee. This zone will extend to area within North/South circulars from 2021. That said, if he's not travelling that far into the centre, and older FZS600 would definitely be a good choice. I have an old 2003 Foxeye Fazer which I'll be looking to sell very shortly. Slightly tatty, but well maintained and runs well, with 64K on it, MOT until July. Better than an older Boxeye - bigger 21ltr tank / 230 mile range, better mirrors, better lights, front fork preload adjusters etc. I'm East London based. I was just gonna give it a 6k service and clean it up before flogging.