From the manual, the recommendation is 90,000 miles or 144,000 kilometres - no time limit. I can't recall ever seeing a thread anywhere where a belt broke and the vast majority of those that report on older belts being changed out say they still look brand new. I have heard of one where the belt had somehow slipped off a pulley slightly and had been worn to half of its original width, when it was discovered.
You can go into the left side of the engine and easily get a look at the belt by removing some plastic and a couple of parts. If you take out the spark plugs and remove the crankshaft timing inspection cover, you can rotate the engine by hand to get a look at the whole belt.
If you know the coolant has been replaced often over the years - with a SILICATE free coolant - the water pump should still be fine. The only problems you can have with the pump is a worn bearing seal, caused by using a non silicate coolant, or a corroded impeller caused by well overdue coolant changes. The shaft bearing itself seems bulletproof. Never heard of a failed one myself. You didn't mention how many miles you have on your bike, but, IMO, a water pump should be good for at least 150 - 200,000 miles