My wife was wanting a project to work on and suggested an electric dirtbike from scrap parts.
We have found a frame at the local scrapyard for $100 and 2 Optima yellow top batteries (2nd hand)
I am planning on a chain driven direct drive bike. The main goal is for it to have a LOT of low end torque for fun off road. Top speed of 60km/h would be fine, a range of even 20km would be fine as well.
I am thinking of a brushless motor so I don't have to worry about brushes to replace. Here are some of the motors I am considering:
* Motenergy ME0708 48vDC, 6-12kW (old badged eTek motor) $450
* Motenergy ME0709 72vDC, 8-15kW (old badged eTek RT motor) $525
* Motenergy ME0907 48vBLDC, 5-15kW $450
* Motenergy ME0201013001, 48v BLDC, 5-10kW $450
Any suggestions would be helpful as well as links to youtube or EVALBUM or blogs to show how well a motor performs. Here are some photos of the bike frame we have got.