TIMING CHAIN I HAVE 141K MILES ON IT WHEN SHOULD I REPLACE IT?

there is no replacement interval on a timing chain.

Depending on the engine type, it could be interferance which means if the belt breaks it will bend valve costing a lot more money than just replacing the timing belt.

Your car has a timing chain, which does not have a regular replacement interval. Use a good quality synthetic motor oil, replace it regularly and the chain should be good for long time. There is a problem with this engine though. The engine block is prone to crack even from one overheating, so make sure the cooling system is in top shape. Get the thermostat replaced, make sure the radiator is clean, hoses are in good shape,no coolant leak at all. I'd get a cooling system flush just to be on the safe side. The good thing is that Honda extended the warranty for 8 years / unlimited miles on the engine block. Zee