Hi
I recently upgraded to a more powerful motor. If you have a metal bike with a bottom bracket size of 68-73 mm you can use this kit. The motor has 500 watts of power and 80 NM of torque. I have all the tools needed to install the kit. I can help you do the install if you wish. Warning, I am profoundly grumpy when working on bikes. Phone support is also an option.
Cheers
Mark Trulock
Here is everything included in the kit:
Tongsheng TSDZ2 500w 48v Torque sensing motor | Johnny Nerd Out
Here are some good battery options:
48V Batteries | Johnny Nerd Out
Here is a video about installing the kit:
Tongsheng TSDZ2B Drive System Installation (youtube.com)