It has the screw in oil cap rather than the dipstick, i did notice that, and the carb is just ever so slightly different to the ones in the diagrams.
There is no kill switch on the cowl, you have to earth the HT lead on the head.
I will get the head off this weekend, good excersise for the kids to measure the bore and stroke and work out the cc. I have a feeling it could be a 3 Ltr motor by the time they finish, but it will help with maths at school for volume Etc.
Once i know i will post it up.
Thanks once again people.