One of the biggest issues depending on mileage is the waterpump seal failing.
Check for any coolant drips from the waterpump drain hole. Upper top of the left hand crankcase and any "cocoa" in the oil. Water in the oil walk away, coolant dripping bargain down as it is a quick and easy repair.
PITA to replace as you have to drain all coolannt but apart from that takes only 30 mins and BMW sell a replacement seal and impeller kit for less than 25 quid.
Also a lot of camchain rattles are due to the hydraulic camchain tensioner. Another cheap and quick repair
Best site to check is The Chain Gang site in the US for loads of reapir FAQ's . The UK site is full of worse Tarka bait than you get in this august establishment
One of my few regrets in life is selling my Funduro, the best commuter/town bike and bimble on a sunday bike I have ever owned.