I recently completed this DIY electric motorcycle. Weighing in at 125 lbs this one-off prototype is super fun on tight and/or sweeping single track trails. As of this writing I have about 20 charge cycles on it and next steps are to make it street legal, improve the battery charging procedure, and to keep having fun riding it.
I sold my DRZ400S after doing the Trans America Trail and put those funds into this project. You can check out my trail blog at www.talesfromthetat.wordpress.com if you like.
I’m not the only one who thinks this is area of light weight electric motorcycles is an unfilled niche. Check out the French guys doing LMX and the Sur Ron bike from China too.
7500 watts continuous (this is the output it will give all day without melting). That’s about 10 hp which doesn’t seem like much but since it’s electric it is a whole different world from a 10 hp gas motor. Another factor to consider with electric is that most motors will put out double their “continuous” rating for short bursts like 30 seconds (IF your batteries and controller allow). Regardless of the numbers there is a smile inducing sense of ample power. It wheelies with ease – at slower speeds. I do miss having a clutch.
52V – 30Ah battery. Cells are Samsung 30Q
Kelly KEB72380 Controller
Shimano Saint Brakes – I need to add a larger rotor to the back wheel but overall the brakes are excellent.
YZ250 foot pegs
50″ wheel base (downhill bikes are in the 45″-50″ range and modern dirt bikes are around 58″)
35″ seat height (modern dirtbikes are generally 37″)
125 lbs. For reference: downhill bikes ~ 35 lb range, modern gas dirtbikes are at least 220 lbs
67 degree head hangle
13″ ground clearance (similar to modern dirt bikes)
Front and rear suspension travel is 7″
Range: so far I get about two hours of road riding or three hours on single track trails.
Here I have turned the smaller scale drawing of the frame into a full size on brown paper so that I could verify bend angles on the frame tubes.