Found out my 'new to me' bike wasn't recording any speed/milage on my maiden voyage on the weekend.
Had a look at it this afternoon and noticed that there's no magnet in the front disc rotor and no round hole to put a magnet.
Can only assume that the previous owner installed an aftermarket rotor, perhaps for the MX version instead of Enduro version?
If I araldyted a magnet into the gaps on my rotor, this should work shouldn't it?