Originally Posted by bikeme
Are you saying the replacement head studs from SBP will not work because their threads are the same on each end? Where are upgraded studs with different threaded ends to be found? ~Bikeme
Just check your studs then compare them with what SBP sells. Whatever the thread pitch is in your engine case must match what you plan to replace them with. As for the top end, it doesn't make much difference if you replace the acorn nuts with hex. Simply match the threads. I hope this answeres your question.
Sick Bike Parts should be able to answer any questions you have about thread pitch. They are good folks to work with. Email or give them a call.