Author Topic: just built an electric bike  (Read 9373 times)

Re: just built an electric bike
Reply #15 on: November 08, 2012, 03:23:31 AM
first proper ride on it today... rode into work, 5miles, average speed 18mph, top speed 37mph, took about 20min

was nice to be on a bike and be able to keep up with traffic....  overtook a moped at one point... just couldn't resist it (there were 2 lanes and no cars)

other than that, I've been doing a mile and a half every night taking the dog out... I stick to 5mph ish so she can happily trot along side me... I'll give it a few more weeks and then start going a bit further :-)

got some new 2.4wide tyres on which help smooth the ride out and are much better in the mud too :-)

Re: just built an electric bike
Reply #16 on: November 08, 2012, 07:45:36 AM
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 :ptu: :nana: :panic: :rock: :rofl: :worried:

Re: just built an electric bike
Reply #17 on: April 12, 2013, 03:00:01 AM
quick update

new motor, in a motorbike wheel, good for 12kw continuous and over 20kw peak

running a 2.5kw controller right now, but I've got a 32kw controller on the way (programmable so I can limit it down)




also ordered a cycle annalist - a handle bar computer thigie to go between the throttle and controller, so the throttle will adjust power instead of speed

otherwise it would just do this...


p.s. that's my nephew in the photos above not me, I was taking the photos... he's only 16 and almost as tall as me :-o

Re: just built an electric bike
Reply #18 on: April 12, 2013, 06:53:06 AM
What frame is that? Looks like a barracuda.
How have you modified the swing arm to take a 150mm hub?

Re: just built an electric bike
Reply #19 on: April 12, 2013, 12:50:07 PM
What frame is that? Looks like a barracuda.
How have you modified the swing arm to take a 150mm hub?

yeah it's a barracuda... gave one of the lands who works for me £30 because it had a broken pedal :o

to open up the swing arm..... I jammed a little trolley jack in and jacked the apart a bit :D


it's the same frame I've had all the time, totally bodged but I'm just experimenting with it until I find something better or build myself one

any idea what size bearings I'll need for the heat tube ? the top one has totally gone, handle bars jump forward about 5cm when you brake right now :-o

Re: just built an electric bike
Reply #20 on: April 12, 2013, 12:57:41 PM
have you got a better picture of the headtube/stem area?

It looks like an 1 1/8" threaded headset.  You would be best off cracking it all open, and going to a bearing shop and get loose bearings.
If they are in a cage, you usually add 1-2 extra bearings.

Have you tried tightening them?  Loosen the top nut, tighten the bottom one until the forks move freely and smoothly, then tighten the top nut again.
You might need some thin spanners to achieve this.

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