I made it here is what I used .... combo Tachometer / Speedometer --- Tach works and Speedo only counts miles no MPH ...the green Digital is from a bicycle computer for MPH... I used a speedo from a Norton green dot --- they are small enough to fit and the trip miles are a separate combo inside .. the tach is a stock cb750... machining some parts to work with a rear cable drive from a pre unit BSA to fit my CB rear hub ... sorry I will try to take more pictures next time .. post more when I finish.... 1st and 2nd version ....