The BM was 33 years old Nick, it replaced a 2008 Triumph Thruxton which i had for four years but found it way too heavy and not the best handling bike i've had, the BM was much better handling and weight wise, lower centre of gravity which made it feel lighter.
The reason the BM started knocking?...i forgot to check the oil level, although i gave her a full service before i went to the TT, so i was more than surprised that the oil ran out so quickly (not literally ran out!!).
It was probably burning it.
Anyway, after 40-odd years of biking, i'm rather ashamed that i destroyed her, i'll either sort her out or sell her as she is. we'll see.
Thanks for the warm welcome guys.
G ; )