Thanks turbofurball, I’m think of taking frame and rear arm into work as we have an aqua blast unit for cleaning auto parts etc.had a good look over frame after degreasing and pressure washing and so far apart from a very small ding in one bottom rail looks ok,my plan is to refer as many old parts as poss and keep as a used restoration.good tip on getting into trials on another unit as only dabbled in trials before. MX was my ball but old age has slowed me down a tad lol.Thanks again for all information and tips,will post some photos of restoration as it progress.
Cheers and gone from Cornwall and stay safe everyone,there will be plenty of time to go out and play another day