You will have a speedo convertor fitted.http://www.ebay.co.uk/itm/Speedo-Conversions-KMH-to-MPH-/111373393344?pt=UK_Motorcycle_Parts_13&hash=item19ee5f1dc0 It fits to the end of your speedo cable and into the back of the clocks. If you want to change the clocks to mph ones, you simply take the old clocks off and unscrew the speedo convertor. Refit the speedo cable to the mph clocks. Simples
I thought we have an electronic speedo, as in no cable.
i am replacing my mph clocks soon to aftermarket ones if you need to source some. Approx 30000 on clock no issues with them at allwill be flea baying them for around 100, fellow foccer 90 posted to your door.
Remove the seat and remove the right side panel (the one under the seat). The speedo sensor lead is located under this panel, most likely there is a speedo healer plugged into the loom somewhere around there.
Still got the speedo healer fella?