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Discussion Starter #1
i ran my sled through the gun today and held her steady at 100 on the ac speedo(on ice) radar was 89. has anyone ever used a black magic 130 speedo and if so have you checked it against a gun ? are they out to lunch like the stock ones?
 

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well from my experiance the speedo is never going to be right on...mine is about 7 mph off on the ice and we all know in the snow they are off...if it was my sled i would leave the ac speedo right in it
 

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I'm about the same 100 on the speedo is 88 on GPS I bet that the BM speedo is the same. :huh:
 
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