Aftermarket tachometer

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Hello,Im pretty new to the Motorcycle scene,I have a 2005 GS500F, I was wanting to upgrade to a digital tachometer. I know everyone says to take it to a trailtech viper. I was looking into them and was wondering if anyone had any videos or pictures (or hell,could point me into the right direction for a forum with steps). I couldnt find any videos on Youtube about it and i feel like i sifted through a bunch of open forums on the subject and couldnt find anything. I appreciate it,thank you in advance!