Frederick Wilson wrote: Should I back off on the bottom nut? Also:
> What is the torque spec for the top stem nut? Yamaha calls for 80
> ftlbs which made the front end a little stiffer.Has anyone tried to
> use a torque wrench with the factory spanner? The arrangement would
> appear to give a mechanical advantage to the wrench and create false
> readings.
What happens is that when you tighten the top nut, it forces the bottom
nut to the other side of the threads increasing the preload of the
bearings. If you have "loose nuts" the torquing can be a nightmare to
get the right results. If you don't have an annoying "weeve" don't
worry about it. If you do, try decreasing the preload torque by 2 lbs.
Yes the Yamaha tool would not be an accurate reading. However, perhaps
they thought of this when giving the torque reading using their own
tool.
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Paul Sayegh
V-Max Technical List Administrator
VMOA Northwest Director
V-Max web page http://www.sayegh.org/tips.htm
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