I have a yamaha xt125r i changed the battery now its reconnected the speedo displayes ntrd and endr even when the ignition is off and doesnt change when the bike is running just keeps flashing this i have tried switching off and pressing the mode button any ideas

i have an xt125r and i had the same problem. try disconnecting the battery for a few minutes then when u reconnect it the screen will flash endr/mtrd and select your model(mtrd for xt125x) by turning the ignition key and pressing the blue button(the one u set your lcd with)
when it's on mtrd. the battery is under the seat:p. hope it solves your problem, and make sure it's an x(much smaller front wheel)

Turn the ignition on and hold the pass light button in when it says either endr or ntrd depending on whether your bike is an enduro (off road) or the other one (don't know the name).

the speedo is only set in mph but yamaha use the same speedo on the xtx and the speedo is run off the brake discs they are differant sizes so you must be set to the xtx.
what you need to do disconect the battery (under the seat)leave for a bit and you should have ENDURO and NTARD flashing on the speedo (ENDURO IS FOR THE XTR AND THE NTARD IS FOR THE XTX) JUST TURN THE KEY WHEN IT SAYS ENDURO IT SHOULD RESET.