Does anyone know the torque value for the cylinder head studs on a R1250gs engine? I downloaded a R1250 "service manual" but there is almost nothing in it about the engine that I can see. Does anyone know if BMW has a separate service manual just for the engine itself? Now that BMW no longer sells manuals to the public, large repairs are become very difficult to do. I just found out that the idiots that serviced my bike out of state on a long cross-country ride completely cross-threaded the left cylinder spark plug. No chance of removal (it's so bad I can only turn it about 1 turn ether direction before the plug locks up solid) without removing the cylinder head and taking it to a machine shop. Hence the question about the stud tighten torques.