The Electric Bike

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Virtual-R
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The Electric Bike

Post by Virtual-R »

Posted this up originally on the cycling discussion thread, but decided to start my own and post up a few extra stages of building that I'm following on with.

From the original post:
Virtual-R wrote:Just noticed there was a section here for bicycles so thought I'd post up my new pride and joy. Recently I've taken up cycling too and built a hybrid electric bike. Even though it has the motor, it still needs a decent amount of effort to ride (for me anyway). I'm using it as a pedal assist, however I switch to manual throttle and also to cruise if required (good when you need a bit of rest but want to keep moving). So far I've lost 5kg since I purchased it, I was extremely unfit previously and just riding a standard push bike around the block would make me feel like I was about to die. Now I find when the motor is off, I can ride for around 30 minutes on mixed grade paths, so I'm slowly getting to a acceptable level of fitness.

Here is a few photos of the bike, it's nothing flash. A K-mart special they were clearing out. They were dumping all their bike stock and marked everything down to basically give away prices, I'd always wanted a dual suspension mountain bike so it fitted perfectly.

Here it is when I first purchased it:

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After finding out my level of fitness was beyond a joke, I made a few inquiries into options for some kind of power assistance. I'd previously owned a full sized electric scooter, but sold it when they changed the laws restricting them to 10kph. The scooter was also stupidly heavy and the 200w motor seriously struggled, even still it would make it (eventually) to a top speed of 28kph, cyclists however would blow past me like I was standing still lol

I ended up looking into things more and found kits available overseas which use the same kind of system for bicycles. Found a really good supplier in China who was very helpful, so placed my order and within a week it had become an e-bike :)

Image

Since then I've been riding it daily, really enjoying being able to head to the local parkland's each morning for a ride. Made a few changes like adding lights to it, fiddling around with the electronics to get a bit more torque out of it down low and extend the battery life so I can travel longer distances. Friend helped out heaps by making me up a custom rear pannier rack. It's still a work in progress though, lot's more I'd like to change to make it more long distance friendly.

Here's a few photos after this mornings ride, thing is a bit muddy the paths were a nightmare after the rain, came home covered in mud. Think I need to find some mud guards for it next

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The reactions when most people see it are good, only troubles I've had is from a few car drivers throwing abuse (and one time a bottle of coke), assuming this is what comes with cycling in general within Melbourne? Also a couple of hardcore cyclists have a bit of a go at me for riding it, but usually most of them will smile and give a quick hello. I assume some urban professional cyclists maybe don't favour these things too much either?

I've been stopped by a few people who are interested (or confused) and asked about it. When I head to the local shops here sometimes the store owners come out and take a look too. Let one of them take it for a ride the other day and he loved it. Most people seem to turn into little kids when they see it and are amazed because never knew they existed.

All up I think it's probably the best purchase I've made in a long time. Very determined to build it up more so it's able to travel longer distances with assistance, but that will come with upgrades to the batteries along with increased levels of fitness.


Since then, I soon realised the little bag on the back was no good for carrying the batteries, they would move around that much the wires would fall off the batteries, also the weight ended up almost snapping the rear pannier off. Having owned a scooter previously, I thought a top box would be the best solution.

Picked up a "small" top box off ebay, which turned out to be a lot bigger than expected, guess they are meant for motorcycles after all

Fitted it up, all good:
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After that, spent around 4 days solid making up a custom mounting section for the batteries to sit, fixed solidly in place like a car battery. Separating the weight as best I could to make it easier to ride, along with mounting the ECU and having the sides free for wiring coming in and out:
Image

Still a bit more to go on it, need to tidy up the wiring so its all neat and fixed in place. Will be sectioning off the wiring areas from the batteries, and closing the top up with some MDF.

Also got some car fog lights which I converted into headlights, which will need to be wired in and mounted up.

Hopefully few more updates soon :)
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Bauer
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Re: The Electric Bike

Post by Bauer »

I think it is awesome

and thats a big box Roy :up: looks like you are hauling your Weber around to a mates place to cook lunch :D
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Stu
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Virtual-R
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Re: The Electric Bike

Post by Virtual-R »

LOL does look like a modern Weber a bit, my sister said it looks like a Transformer from the back

Kinda wish it was a bit smaller but it's here now so I'm stuck with it, heaps of left over space to store things in though so won't need to carry a back pack any more

Seriously considering setting up regenerative braking next, was thinking about going for some lithium batteries but regen should make the battery distance about the same, expecting lithiums to drop in price next year so might hold out until then
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Re: The Electric Bike

Post by norbs »

Studley is right, that's rolled gold my friend.
Sarc ; my second favourite type of gasm.
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Bauer
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Re: The Electric Bike

Post by Bauer »

You still have this Roy?

I was talking to Haze today about electric bikes after seeing some (older) kids riding petrol bikes up and down the street
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w00dsy
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Re: The Electric Bike

Post by w00dsy »

You and Haze should have been talking about electric mobility scooters not bikes.








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Re: The Electric Bike

Post by Bauer »

Image
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Re: The Electric Bike

Post by Hazelb »

Just in case you guys dont know which I am, Studley is a BUD fan!
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Re: The Electric Bike

Post by norbs »

Hazelb wrote:Just in case you guys dont know which I am, Studley is a BUD fan!
When did you get the toupe' ? :p
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Re: The Electric Bike

Post by pab »

norbs wrote:
Hazelb wrote:Just in case you guys dont know which I am, Studley is a BUD fan!
When did you get the toupe' ? :p
:lmao:
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Re: The Electric Bike

Post by DarrenM »

[youtube] [/youtube]
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Re: The Electric Bike

Post by wobblysauce »

Now there is a scooter... Wonder how one would make it road legal.
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Virtual-R
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Re: The Electric Bike

Post by Virtual-R »

Bauer wrote:You still have this Roy?

I was talking to Haze today about electric bikes after seeing some (older) kids riding petrol bikes up and down the street
Hey mate, sorry didn't notice this message until now. Yeah I've still got it, I've upgraded the battery packs to an expensive lithium one (more power storage and lighter weight, easier to position weight towards the middle of the bike too) and reworked the inside of the top box, added switches for the motor and lights plus a panel mount for them. Planning a new motor in the near future too, there is some around now that are a lot better than when I purchased my one.

The current motor has some really good torque and speed but at the expense of draining batteries fast, going to step down a little but stick to the 36V which should let me keep the torque but without the higher top end speed. All I really use the motor for is hills where I don't have the power myself to pedal up them, so really no need for a high top speed motor anymore.

The bike owes me about $2200 all up so far, but knowing what I do now I probably could build one properly from the start for under 1k.

Had a blast last year taking the bike to bendigo and doing the rail trail to axedale, hoping to get to a few more once the new motor arrives.
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