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does anyone know what the 10-9 reading means that comes on when you first start? seen one this past weekend that said 8-9 and owner said it changes after updates. does that make sense?
 

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that is the ratio for your speedo, the sled that said 8-9 has the smaller 9 tooth drivers ( a renagade) right? all mach's with 10 tooth drivers say 10-9.
 

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Fanny
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My 550FX says the 10-9 as well.
 

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10-9 is for the ten tooth driver and is used to calibrate the speedo.
9-9 is 9 tooth driver 8-9 is 8 tooth driver. You change this if you change your driver size and want your speedo to read correctly.
 
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