not too bad a job (if it lasts)
was looking at the cam and noticed one of the lobes was shaped like a witches nose
must of been starved of oil at some point, it had also worn a 1m deep groove in the rocker.
was on the exhaust valve of cyl 3, didnt test to see how much the valve actually opened
if at allcrankcase breather was also gummed up
got a new cam and housing with rockers etc from scrappy £15
started her up and smoked really bad! but luckly it was steam! was very noisy but has now quietend down really nice after a few mins, just hope it lasts