All the engines that I have acquired were either in 'big lumps' or had been standing in garages or sheds with no heating and leaking roofs, so damp and alternating hot/cold conditions leading to condemsation inside the engine that is very apparent when lifting the head or taking the clutch cover casing off. Hence my comments about stripping a motor, rather than giving it a wee 'try' first. Also my mates experience, with a narrowcase 350 he was given in memorium of his friend that had been sitting in an unheated shed. Big end knocking within 300 miles, after the double oil change advocated by George et al, including me.
Be VERY aware of shims and their position when removing parts. The shims need to go back in the same place, hopefully nobodies been there before you to give them a 'mix up'! A motor will come apart in less than a morning, if you have the where withall. However, the rebuild will take at least a two to three days and again depends upon your mechanical apptitude, tools etc.
Ventodue/Craig, that is a bonnie looking bike!
Good health, Bill
!
. Jon has a green and white, the first series. Me, a second series in the Catalan Senyera colours of red and yellow.
sell some of what I have and go looking for one!