Beach Cruiser - powered by Hyena

Perth_ebiker

Perth_ebiker

100 mW
Joined
Oct 3, 2013
Messages
35
Location
Perth, Western Australia
Hi, I am from Perth (Western Australia) and thought I'd share a pic of my first ebike build. The idea originally was to build something inspired by the early Harley Davidson's - I came across these forums, got in touch with Hyena and this is the result. The frame is a matt black Electa Cruiser 7D with full mud guards, Ive swapped out the cruiser bars for something simpler, and fitted a Brooks sprung saddle. The battery fits in 1 side of the saddlebag and the controller is mounted underneath on the rear rack. Hyena has put together a great kit including a cruise control and 3 mode power switch. Range is 30km+ and top speed is about 50km/h according to my GPS. Apologies for the lack of technical information, maybe Hyena can provide the specs on my behalf. Anyway, keep up the great work - the forums are great reading, and hopefully will see a few more WA ebikes in future.

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Looks good mate, nice stealthy cruiser and very cleanly put together. I imagine the average person would need to look at it very closely to notice it's even electric. The saddle and bags suit the ride well. Have you thought about getting some matching leather or leather look grips too ?
Here's some on ebay that would probably suit perfectly, they're designed for a gripshifter so ideal for the half twist throttle.
Failing that you could get any old matching set and cut one side down, but I'm not sure if the stiching would hold up or unravel.

http://www.ebay.com.au/itm/LEATHER-BICYCLE-BIKE-BAR-GRIPS-VINTAGE-BROWN-GRIPSHIFT-/300909479347?pt=Cycling_Parts_Accessories&hash=item460f9a45b3

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As for the spec, I can't remember but it looks like a street legal 200w ebike to me. Or was there an extra 0 on the end... :p
Just keep an eye on the controller temperature in the summer heat (touch it with your hand and make sure it's not burning hot) You've done a good job of hiding everything so it's hard to see how much airflow it'd be getting but it needs to catch a bit of breeze to keep cool, especially if you're riding up hills or maintaining top speed for long periods of time.

There's plenty of other ebikers in Perth which you'll no doubt happen across sooner or later.
 
Maybe they are back to front - I didn't really think about it. I've only used cable ties to hold everything down so can easily swap them. Most importantly, the non battery side can hold 2 bottles of wine which helps balance the weight a little.
 
Perth_ebiker said:
Maybe they are back to front - I didn't really think about it. I've only used cable ties to hold everything down so can easily swap them. Most importantly, the non battery side can hold 2 bottles of wine which helps balance the weight a little.
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wine haha YES..
looks really great. how does it feel cuzing on paths and such at speed? looks like it would be very easy to steer and hold itself well at high speed, although allot of weight at the back to pull the back weel away if you hit some sand on the path around a corner. probly would behave quite predictably anyway.
what PSI you running? and tyre width?
 
Welcome aboard and nice stealthy looking bike there...

Keep your eyes peeled for posts about group rides- we tend to do a couple a year. Round the river is really nice but we do have to stop to let the motors cool down. For some strange reason that has always seemed to happen right outside a pub!
 
It handles quite well - I was surprised with all the weight on the back wheel but it's not a problem. I think being a rigid frame helps - the bike remains level regardless of where the weight it. I got the chance to ride a Stealth Bomber on Saturday - one of the stores in Scarborough has started selling them. Apart from the amazing power and brakes, I really notices how softly it was sprung and how it dived under brakes and acceleration. Not having ridden many full suspension bikes, it was quite disconcerting at first.

I've changed my tyres this weekend - The standard beach cruiser rubber was really average - basically a flat surface with tread, and no shoulder if that makes sense. As you tipped it in you could feel the edge - if you've ever ridden a motorbike with a squared off back tyre it's the same thing. This weekend I've fitted some 26x 2.5 Hookworms at 50psi, and they make everything much smoother- the bike rolls into corners as you'd expect. I'd like to try a frame bag at some stage and see what effect that has.
 
Perth_ebiker said:
I got the chance to ride a Stealth Bomber on Saturday - one of the stores in Scarborough has started selling them. Apart from the amazing power and brakes, I really notices how softly it was sprung and how it dived under brakes and acceleration.
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Stealths have tones of travel in suspension hey. and the bomber weighing 50+kg probly exagerates it.
nice choice with the hook worms they do grip pretty well and on a wide rim like 38mm or more they have a nice profile for leaning as you say without the square edge.
50PSI, you must feel every crack in the road with no suspension? have you considered seat post suspension like this-
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Very sweet ride,well thought out.looks comfortable.
 
Just an update for everyone. The beach cruiser is now 4 years old and still going strong, and is now in the process of getting a battery replacement.

It's been flawless since everything was hardwired about 3 months after creation.

Im looking into either a 14S6P triangle (14aH), or a 14s5P brick for the possibility of transplanting to electronics into one of Hyena's Beta frames...

The cells I am most interested in are the INR18650-25R cells, the 30Q seem to be a bit out of my price range. I don't know - whats the view ?

I would also like a Cane Creek Thudbuster LT seatpost, but I need it in a 26mm size which is no longer available via Wiggle or ChainReaction. Anyone willing to part with a second hand one ?
 
G'day - think I've seen you out and about...

Mate has an em3ev 14s9p 30q triangle on his cube/mac and I have an em3ev 10s9p 32e brick in my trunkbag-running these at max 1.5c they're both awesome batteries but wouldn't run the 32e with any more current than that. The 30q no problems. I got a 10s3p GA from samd and this is on a bbs01 running up to 1.8c peak - again great. .

Another option is em3ev have the Samsung 33g at good prices another lower c but higher capacity battery. Can't really go wrong with any of these or the 25r so long as it's specceds for discharge/range - what motor/performance combo are you after?
 
The EM3EV pack with the 33g cells is attractive - 18.aH is more than I think I need for the commute and the price is nice. Hyena has said I can get away with 2900 maH Panasonic's but I'm not sure which ones they are. My setup only draws 40A at peak and 10-20a when cruising so I think I have some wiggle room with any of the kits EM3EV advertise. I don't have a CA on my bike so it's all a bit of a guesstimate but a round trip from Duncraif to work is 34 km so @ 25w/km 850 whr pack should mean I can get there and back on 1 charge. (I have no idea if 25w/r is right thing - I think I read that somewhere. It could have been 25w per mile actually)
 
I'm greenwood and run pas at around 10-20a with throttle peak of 40a with a little over 1kwH pack (but I only charge it to 80-85% to prolong life) - worst case for me it's 660wH round trip when it's windy but more typical is 550wH for the 39km. That's with 7% regen. The 14s7p brick 33g pack would be plenty for my ride so I've been looking at that one myself. The 14s5p maybe stressing the 33g cells and compromising life that's why I ruled it out for me. 25wH/km is high I'm in the 13-16wh/km range and I've got a little more hills between Reid and Warwick. Mate is running to Craig and back again 550wh plus for his 50kmh commute and is charging his 30q to 80%.

So my opinion (and have lots of them haha) is the 5p 30q/MJ1 brick pack would be pretty good as it can handle any periods of full load with ease, the 5p 33g brick maybe running a little too much c for full life of those cells (I would limit the peak amps to less than 30 myself on that pack), the 6p Triangle 33g is in my view the sweet spot for our paths and would be plenty c and heaps of range and last a really long time.
 
Perth_ebiker said:
After 4 years...

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Looks great. Sturdy bike. Nice build by the way. I just got into e-bikes recently. I started latte last year. I built 2 bikes over the winter. One was a gas bike that I sold, the other my first e-bike that I drive to work every day I can.
 
The bike got a major upgrade today. I got inspired to buid a battery box out of flattened pvc water pipe and aluminium.

I'm not very handy and it's a but rough in places but I'm chuffed at how it turned out.

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My first electric bike was on a beach cruiser. My second is on a mountain bike with disc brakes.
 

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The bike got another upgrade today - Thudbuster LT seatpost. Combined with the spring Brooks saddle it should be a plush ride. First commute tomorrow.

She's being used daily at the moment - 170km a week

New battery is enroute from EM3EV

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