alrighty pal, how much would you be wanting for it?
having said all the above, i still went ahead with fitting the second hand cap, and fired her up (fair amount of steam came out of the zorst but im putting that downt to the rocker cover being off over night and the new cam-shaft...
anyhoo, left it running a little and sounded ok. so i popped off the rocker, took the new cap off and checked for any signs of irregular wear and seemed ok... also offered it upto the orininal and it looked to be exactly the same.
anyway. the noise i was thinking that could be the tappets, my dad suggests might be the bottom end... which aint good. will keep you posted cos its going down to the local garage to get they're opinion.
fingers crossed its not gonna cost too much.
thanks for the warning thogh people, as ever, very helpful and considerate!
rob