Ed, if you don't see any issues, black rubber bits on the oil filter from the rub blocks on the chain tensioner, rattling from the front of the engine or a jumping or erratic timing mark when checking the ignition timing, I wouldn't tear into it at this time .
I replaced the original chain on my '81 R65 about 15 years ago at 45,000 miles, had a rattling/vibration, I was told it most likely was the timing chain .
I replaced it, no help, it was the beginning of the transmission bearings going bad due to water in the transmission .
I kept the original chain and plan on reusing it when this chain goes bad, if it ever does !!!!!!!!!!!
With 3,000 miles a year of use now, I don't foresee doing too much major work on the bike .