I will give you details of :---
Dakota Digital MCV-7000 series Speedometer/Tachomenter .This speedo/tacho units fits good with kawasaki mean streak.
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To get the exact wiring, please click the link below:---
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To see how it looks on your Kawasaki mean streak.Please click this link and see the video:---
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This will give you idea of how it looks.
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But if you choose any other brand after market speedo, then also the wiring for that speedo first of all comes with the after market speedo manual.And also this after market speedo wiring will help.The wiring's are near to same.