Indiactors wont flash they just stay on what could be the problem yamaha fzr 250r 1993

Does your horn sound normally when you have indicators on, if it's muffled or goes quieter with indicators on, you may have very low voltage available from your battery. Your CDI/Reg-Rec will not cope with a battery below the parameters set. IE, it will stop taking a generated charge below a certain voltage, indicating a dying battery.
If one of the indicator globes is blown (including dash indicator) they will not flash. If all globes are good, try cleaning the flasher relay connections, or the flasher relay itself may have died.
Cheers!