Keeper of the Bookmarks / Moderator
Join Date: Oct 2006
Location: Oologah, Indian Territory, USA...
Model: GL1800 Hot Rod Yellow
not talking about the ratio of tach vs speedometer, those are mechanically linked and fixed.
you made it sound like the tach will not change vs the actual GPS speed. and it will, it has to.
the tach is linked to the tranny output shaft via the gearsets.
the diameter of the tire is going to change that ratio.
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