Well thyere I was having an excellent GTA day....the speedo is working again, I'd just changed my bent gear linkage and had been into town to shop when......I noticed a slight knocking noise that speeded up with the revs and was definitely coming from the engine. Stopped and had a listen.......sounded an awful lot like big ends going to me, although it seemed to be coming from too high up in the engine. Took it straight up to see Mike at the local garage. Sharp intake of air....'it doesnt sound good to me!'. Thirty seconds later it was sorted.....you'll never guess what it was