hello. i have a yamaha dt 50 r 2004 and i am having a problem with it at the moment, when i put the key in ignistion and swich it on nuthink is cuming up on the on the speedo but when i take the key out of the bike its cuming up on the speedo flashing (6p then 12p) and it also flashes up saying (NTRD then ENDR). is this trying to tell me whats rong with the bike. if you know what this means and how to sort this problem could you please let me know. thanks