Skyliner70cc
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- Nov 17, 2007
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I sheared a head stud at the crank case while re-torquing the head bolts on my HT. Three of them did fine and the fourth sheared. I managed to drill it and remove it using an an Allen wrench ground to a square taper on the short end, and hammered into the stud. I bought stainless steel all thread to replace the studs. I decided that the stud sheared because the nut was not lubricated at the factory, and had frozen on the stud. I suggest using an anti seize compound on the threads before assembly.
FYI, if you use antiseize on the top thread of the stud that holds the head, you cannot use the normal torque value. You should lower your torque value by about 50% or you risk shearing another stud.