People used to tell me all the time that my bike was leaking oil and I always replied that I would be worried if it wasn't since that meant there was no oil in it. Now both my 66 and my 69 never leaked oil except what came out of the breather onto the chain.I have to say Triumph made some design changes in 72 that were not good ideas and more prone to failure. The trans cam plate (done in 71 if I remember) was a stamped steel plate instead of the machined one and they went to push in headers that just pushed into the aluminum head and tended to wear the exhaust ports out.
I learned all I need to know about life by killing smart people and eating their brains. Eat right ,Exercise ,Stay fit, Die Anyway!