Ive had my 51 plate zr for a few months now. Kept it in really nice condition, fitted central locking and planning to fit electric windows this week. Since i have had it i had problems with the speedo cutting out randomly. I changed the 2 sensors that you can get to without removing the gearbox. Problem still didnt go. Ive then had the entire gearbox removed and had a new driveshaft, bearings, etc all changed. I am still having problems with the speedo cutting out. I really dont no what to do next, i might end up selling it and trying to find another zr 105. If anyone could help it would be great.....