Dahon Jetstream conversion

[cwah]

Yes looks much cleaner.

I did the battery myself with us18650V3 cells. I've choosed them in the past because they were cheap and have good life cycle. I may buy ncr18650b if I can.

The pack is a 9×14s = 126 cells and 1000 wh.

Which is a decent contender from my other pack.

 

[cwah]

The tape wrapping the battery to the aluminium board teared down. I tried heavy duty tape but it still can't handle vibration from bike and also split apart.

I need some sort of heavy duty Velcro or belt to keep the battery on the aluminium board. Something that keep it on the bike but where I could have a quick release to take the battery out.

Any idea of a strong heavy duty with quick release strap/belt?

 

[cwah]

Picture of the pack with tape all teared down
https://www.dropbox.com/s/icckmqu4h2fk9qd/2014-09-11 18.32.38.jpg?dl=0

Need to find a solution

 

[Nealh]

Quite a bit of weight to keep in one place without wanting to shift !!!
I liked d8veh's solution for rear battery holder which I saw at Redbridge.
A ply base board that fits in the bottom of a sports boot zip bag this is then bolted through to the carrier, any sloppieness of the battery can be padded with foam.

 

[jhruk]

I'd have thought you'd need something, such as velcro, to stop the battery sliding on the base and then a strap to hold it down securely.

I use a rack pack with Velcro attachment and put a cam bucle strap around it. It's held a 5kg battery secure for several years. The straps are easy to tighten and quick to release.

Cam Buckle Strap

 

[cwah]

Thanks for the reference. I purchased the most heavy duty one:
http://www.ebay.co.uk/itm/301292242413?_trksid=p2059210.m2749.l2649&ssPageName=STRK:MEBIDX:IT

 

[Deleted member 4366]

That looks very. Wouldn't a couple of these be better? They're quick release too.

http://www.ebay.co.uk/itm/1-set-2-5m-Side-release-Luggage-Suitcase-Tie-Down-Strap-/180699532973?pt=UK_TravelTickets_Accessories_RL&var=&hash=item2a12880ead

 

[Deleted member 4366]

or a couple of these:
http://www.ebay.co.uk/itm/Black-10-Pcs-20x450MM-Velcro-Tie-Down-Straps-Cam-Buckle-Wrap-Band-luggage-Strap-/231118854157?pt=UK_TravelTickets_Accessories_RL&hash=item35cfc1d80d

 

[derf]

Update on my conversion:
- I have dual big apples. It looks like it does take longer to worn out. But I only have them since 3 weeks. Time will tell.
- All sine wave controller I tried to date are damn bad. They are noisy over 75V, do not regen and/or are less efficient. I'm using back square wave controller.

Rear seat is finally installed (D8veh licensing!):

As you can see, I used 2 aluminium tube because I'm planning to convert it to rear seat. I'm going to have a test subject very soon.

Same for the rear trolley, I'm using this silverline one:
http://www.amazon.co.uk/gp/product/B000LFYO7E/ref=oh_aui_detailpage_o04_s02?ie=UTF8&psc=1

For now, all seem good. I did a 30 mn run with strong start, max speed at 30mph, potholes, start&stops... It holds it well.

Next stage, get a test subject and put some luggages on it. I hope it's going to hold it. And it's 3 years warranties anyway

farting nora that's brave, I'd have loved to see the test run with the unsuspecting trolly finding itself doing 30 mph on a potholed street...thanks for the detailed write up, it helps loads with my work in progress

 

[cwah]

Thanks guys, I have my 2 straps now, it's working nicely!

I can even put my work bag on top:

I can fold my bike in my room:

Now I need a tool to remove my single speed to put a multi-speed:

Any idea where to get a good cheap one? thanks

 

[cwah]

My rear rack is wobbling!!

Do you have any idea how I can fix that? I fear it may falls on the floor someday!

 

[cwah]

no ideas?

 

[Deleted member 4366]

All your clamps and struts are loose. You need to fix them tight.

 

[cwah]

the aluminium rods start to break apart...

maybe i should get stainless steel? or did i install them incorrectly?

 

[Deleted member 4366]

With the weight of your battery, normal steel tube would be best.

 

[cwah]

My handlebar is down

I tried to put a allen key to open the screw on the bottom but it doesn't work

Not sure if the bolt can be removed actually... do I need some sort of giant allen key on the top?

 

[cwah]

Removed it finally:

What should I do next? Any good and cheap fork to buy?

 

[cwah]

Thinking again, maybe I don't need to keep the folding stem. Maybe I can just get a longer fork with 120mm travel:
http://www.ebay.co.uk/itm/SR-Suntour-XCR-TA-80-120mm-IS-STANDARD-SUPER-PRICE-FOR-HQ-ONLY-HERE-/301366271146?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item462ad45caa

And have the bike higher. Feasible?

 

[Twangman]

I had a ridgeback folder which is the same bike as your Dahon just rebaged. I had a similar problem with the handlebar fold mechanism snapping. It's a common problem. It's a design flaw as far as I could see, I had a friend weld it but it only lasted a few weeks.

 

[cwah]

I tried to remove the fork and the bearing from the bottom fall off

I've lost a lot of little bearings ball:

where can i find cheap replacement???