[quote author=TonyW link=topic=9920.msg102967#msg102967 date=1379722854]
Measure at the tips of the thread to get the male thread diameter. Theory: This is simply a quality control balls up. I don't know what manufacturing process Yamaha uses but probably a CNC lathe is used to cut the shaft thread. At some point either a wrong number was progammed in or something else changed. Something as simple as the cutting bit manufacturer changed the overall length of the tool. Possibly they changed the machine used for making the shafts to one with a faster work rate or one the could do multiple operations like milling the splines then cutting the thread. Yamaha obviously know what happened and when but they're unlikely to tell us. I am now curious to know what the internal diameter of the kit nut is?
Measure at the tips of the thread to get the male thread diameter. Theory: This is simply a quality control balls up. I don't know what manufacturing process Yamaha uses but probably a CNC lathe is used to cut the shaft thread. At some point either a wrong number was progammed in or something else changed. Something as simple as the cutting bit manufacturer changed the overall length of the tool. Possibly they changed the machine used for making the shafts to one with a faster work rate or one the could do multiple operations like milling the splines then cutting the thread. Yamaha obviously know what happened and when but they're unlikely to tell us. I am now curious to know what the internal diameter of the kit nut is?
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