Timpo - below may or may not help. Gives a good indication re torque to any specified thread dia.
Tightening torques 0165 - G 650 Xchallenge
46 - Motorcycle frame and mounted components
46 51 - Motorcycle frame
Rear frame to central bracket
M8
25 Nm
Cylinder head to frame, left
M10 x 40 - 10.9, Lubricate screw
Optimoly TA
74 Nm
Rear frame to frame endpiece
M8
25 Nm
Cylinder head to frame, right
M10 x 55-10.9, Lubricate screw
Optimoly TA
74 Nm
Adjuster sleeve to cylinder head
No play
max 5 Nm
Locknut, adjuster sleeve
100 Nm
Frame endpiece to frame
Lubricate screw threads
Optimoly TA
34 Nm
Frame endpiece to engine block, top
M10
50 Nm
Frame endpiece to engine block, bottom
M10
70 Nm
Frame bottom truss to frame
M8
25 Nm
Frame bottom truss to engine block
M10
50 Nm
Central bracket to cylinder head
M12, install with T-shaped sleeve
80 Nm
Central bracket to frame endpiece
M12
85 Nm
Grab handles to rear frame
M6
loctite 243
10 Nm
Bracket to frame endpiece
M6
10 Nm
46 71 - Engine fasteners, footrests
Front footrest plate to frame endpiece
M10
35 Nm
Rear footrest holder to rear frame
M8
25 Nm