Retorqued the 850 head and base barrel nuts . It was noticeably burning some oil after the 350 kms . break in and time to do it . All nuts and bolts were in need of re-tightening , the front 2 underside 7/16 were very loose and holding no clamping force . All others needed half a turn . The head gasket is a flame ring type from a gasket kit , A.N . Test ride went well , will keep an eye on it all .