Coming from a Haibike with Yamaha PW motor which was smooth as silk (but underpowered) Now have Rize RX bike with bafang ultra and when I stop pedaling, the motor keeps running for up to 1 second. This can't be right? I can get used to it but IMO this is a little dangerous and requires some foresight to ride the bike safely with so much power. Are they all like this or is this what I get for buying a relatively cheap bike.