sorry fellas,missled you somewhere,the original fault was the fifty year old fibre camwheel falling appart,cam stopped,crank didn't,well not untill it jammed on the cam lobes,its been downhill from there,like i say it now runs a treat,just smokey,latest thought is a valve guide leaking when hot,cracked or loose,allowing oil into the exhaust manifold or system,as the spark plugs are spotless,and the piston tops are still clean. are they a press fit or will the head require heating?
