125-200cc My mileage reset to 0km!

Hello guys, I have husqy sm125s 2011. After winter i've changed my accumulator and the odometer did reset to 0km! i've already ran about 2500km , but it was about 24k km before. now you ask me why i want to revert it back to 24k? thats because i just noticed that my motorcycle check-up has ended a month ago, so i need to be over 20k that is written on the check-up that was 2years ago. Any help is apreciated!