ElectricMotorcycleForum.com

go as high as you can.... but realize a 450A kelly does not perform as well as a 450A alltrax. Curtis is good as well....

what kind are you thinking?

Alltrax... definitely Alltrax. Then there was that 650 amp you said on that one website. I could never get a hold of them to see how much they were running.

Ok thanks. Downloading it now. Yeah I think going crappy batteries at first to get it running would be the best idea. Seeings though where I live 55mph is the top speed on most of the roads. I just wanted to be able to hit the highway if I wanted too but I can go for that later on.

Headway would cost: $2176 and give you 400A continuous and be easier to fit into the frame.

This seems like the best way to go but definitely way high of a price, that pushes my budget completely over the edge but is do-able. Is there a different way I can go to where I could still get 400A? I might not even need the 40hp of the engine to obtain 75+mph. All this is hard for my brain to except from all the math and equations needed lol.

BMS not included in that price.

You'll have to remind me what BMS is again.

Batteries, to get the 40hp max out of the motor, is 30ish kw, or 416A, with lifebatts you would need at least a 30ahr pack, 40 would be ideal. Frodus sells some cheaper alternatives to the lifebatts at evcomponents.com 40ahr pack @72v would cost around 1k USD, and easily fit in to a bike.

Yeah I was wondering what miles I would get out of that 40ahr pack that Frodus sells saying that I am going 70mph most of the time and how much would I get if i was going 55 most of the time?

Watched that video, and its a pretty sweet build!

Yeah, this bike made me want an electric motorcycle even more, because like most people I was thinking that an electric bike was slow, but I have seen some really fast home built electric motorcycles.

If I used the 40hp of the motor that would just be accelerating correct? I also wonder if it will accelerate quickly or not as I haven't really found a donor bike yet. Any ideas on what I should be looking for as far as a donor bike with that set up mentioned to go 75+ mph?

The link with that excel thing you wanted me to look at is broken can you send it to me any other way?

Thanks man you are doing an awesome job answering my questions as i'm new to the whole electric motorcycle thing.

I'm trying to build a electric motorcycle from scratch at home. I have the necessary skills to accomplish said tasks. I just have a few questions. Thanks.

Was wondering what motor is able to get a 300lb bike moving along at about 75mph and what motors are better then others?

Can I just change the front sprocket coming off of the motor to make the bike go faster?

How do I get the bike to take off pretty fast and stay going pretty fast with said motor?

Also, how do you figure out how many batteries your really going to need, I know its something like
how many horsepower it takes to do said speed times 746 (which is supposed to equal 1hp) then you have to figure out how many watt hours your battery pack has?

Why does the amps on a controller really matter?

I was also wondering about this battery, what it might be capable of (72V / 10Ah w/VMS, 2 Terminal) and could I only run one of them and get decent mileage?