125cc Starts low then revs up to about 2.5-3k rpms - After battery change

Hi everyone!

First post on here.

I have recently changed the battery in my Lexmoto Adrenaline 125 (Yeah I know its Chinese and It's a bad choice).

The problem I'm having is when I start the bike, it slowly builds revs up until about 2.5-3k rpms then settles and idles there.

I haven't rid it after the battery change nor have I had the engine on for more than about 1 minute. Could this just be a sort of

calibration?

I appreciate all responses !

In case anyone else has any thoughts on this I've checked and the bike has EFI so the link between the battery and the fuelling might be possible . I'll stick to carburettors thank you very much .

Some EFI systems need several minutes to calibrate and often there are certain procedures to follow. No idea what they might be for yours I'm afraid. Might be worth trying a specific forum and searching for EFI calibration.