a mate of mine had this problem, the speedo would work for the first 20 mins then just die.
![](./images/smilies/spacer.gif)
He tracked it to the gearbox.
![](./images/smilies/spacer.gif)
he replaced the speedo drive but that didn't do anything.
![](./images/smilies/spacer.gif)
Apparently there is a nylone gear inside the box that strips sometimes
![Shocked :shock:](./images/smilies/icon_eek.gif)
.
![](./images/smilies/spacer.gif)
He just went to halfords and bought a bike speedo and glued the sensor on to the back of his front wheel
![Laughing :lol:](./images/smilies/icon_lol.gif)