chinese

So I just got these chinese bikes and it has a 72v 80a controller with a 7000w motor. It feels nothing like I imagined 7000w. I read somewhere that it's limited and idk what to change the settings to. From a dead stop the front wheel won't even lift off the ground. It is bluetooth tuned btw. I...

Haven't used this bike since 2018 December, I read that I need to clean up the chains (remove rust, oil it up) What kit do you guys recommend? Needs to be cheap, and chinese. A cheap battery would be a benefit, but I have the skills to solder/wire up a pack my self