This is a rebuild of my old ebike, codename kiyohime. Originally I used a fatass lifepo4 ping battery and a stock 9c hub. I ditched the big saggy battery, built a lipo pack, modded the 9c hubbie, and reassembled everything. The result is a bike that tops out at 50mph, but weighs so little it can be lifted with one hand and handles like a top tier mountain bike. It was a lot of work, but most of the "work" was learning all the skills needed to push stock components so far. Some cool things about this bike:

• 500w motor able to run at 5kw continuous thanks to ventilation and temperature sensors. 
  
• Fully rain proof.
  
• Custom made clamping torque arms.
• DIY lighting system.
• Permanently mounted custom 22s10ah lipo battery pack.
• Charges in less than an hour.
• 20 mile range.
  

Check out this video I had a lot of fun making and

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