What makes a pulse coil generator timing rotor bolt shear off?

[woogs]

Hey everyone

I recently did a replacement of my clutch plates on my 2007 GS500F. The repair seemed to work ... for about 250 metres. The bike hasn't started since then. At first thought it was problems with insufficient fuel, then I thought it was problems with the battery. Finally, I checked over the work I'd done on the bike (let go of the ego, your repairs aren't perfect, double-check your work ....) Simplest thing to look at was the pulse coil generator - don't need a fresh gasket to do that! Lo and behold, the bolt holding the timing rotor in place had sheared off, right at the crank case.

When I installed that bolt, I applied some loc-tite per suggestions here (as that bolt is prone to backing out), then tightened it down to specified torque in the Haynes manual. What would cause that bolt to shear off? Could it just be that despite my best efforts, it got loose, wobbled and then left itself embedded in my crank case?

[sledge]

Unusual fault ....but bolts dont fail without a cause......got any pics?

I vaguely remember this happening to someone else in here but cant remember the circumstances or outcome. The manual calls for 17-23Nm or 1.7-2.3Kg-m, is it possible you got these figures reveresed and accidently overtightened the bolt and strained it or could you have possibly cross-threaded it when you fitted the rotor back on?
Look at the thread on the bolt at the point where it broke, does it look like its been twisted or pulled apart? Post some close-up pics if you can.

You have to get the broken remenant out now, and its been loctited in..........nightmare city 

[woogs]

Yeah, I'll see if I can get pictures posted. I'm going to have a stealership do the repair work for this one though - and have a look over the bike for other faults. I'm out of my depth at this point, things are going wrong and I'm making guesses as to how and why - but guesses aren't comforting at 100km/h 

EDIT: Guy at the service desk at the stealership actually said "Oh wow" in response to "what's broken".