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Update: It is KUNTENG POLLY controller http://www.szktdz.com/en/news_show.php?article_id=587

Hi, I have just bought an e-bike that was cheaply offered in my local convenience store, however I would like to remove the limiter at 25km/h or at least increase it. I have read that, in general, all you need to do is detach the speed sensor wire, usually white, and the limit is gone. But my...