If I recall properly the tread pitch on the bar ends is 1.50 threads per mm fine thread. 1.75 TPMM coarse thread appears to be the most common in the M12.
I have been also searching for M12 X 1.50 70mm to 90mm countersunk flat head bolt either torx or hex for mounting barkbuster type hand guards on a R1200GS, I will watch this posting close, maybe someone will come up with a source for this odd size.
I am currently running a Kaoko throttle lock on a 08 R1200GSA and found the stock bolt long enough to secure the stock plastic hand guard using the aluminum bushing.
The Minnesota Airmarshal
Hennepinboy screwed with this post 02-26-2013 at 11:59 AM