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Discussion Starter · #1 ·
Good Day,

I'd like to convert motorcycle to electric for a summer project. I haven't found a donor bike yet, but I'm fond of 80's Japanese cruisers.

I've turned a few wrenches in my time, but I'm no mechanic, and fabrication will be a completely new experience for me.

I'm hoping to have a top speed of 130 km/h with a range of 100-120km mixed city/highway travel.

From what I've seen so far, I'm leaning towards a three phase ac motor and LiFePO 4 for the batteries. What voltage motor do I need, and what size battery pack to support it?

I'm comfortable going 5-7k for a budget, but lower is always better.

I'd love suggestions on parts, and any help getting more farmilliar with the lingo (volts, amp hours, ect) would be appreciated.


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I'd head to first, lots of us over there have converted and it's a good place to start.

Fab is going to be the key here, because of tight packaging on a motorcycle.

130kmh is doable, but you might suffer a little on the low end unless you have a lot of power capacity in the motor/controller and batteries.

Range might be hard, but its doable. You have to get some dense batteries. I wouldn't go lifepo4, but something LiIon (NMC or other). Avoid lipo. You need something dense and easy to package.

Voltage is up to you. Size of pack depends on a lot of things like how many Wh/mile you'd use. The faster you go and the more you "gun it", is going to take a higher wh/mi. I'd estimate that you'd need 125wh/mi average for highway/city. So if you want 75miles , that'd take about 9.4kWh. That's going to be a little hard on a smaller bike.

5-7k for that range and speed is going to be hard, esp with a doner and fabrication.
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