Confused!?....

[ncrukrepairs]

Hi there.

After my bad experience with powerscoots! I eventually ended up with a Cyclone electric bike (650w). While this kit was fairly solid the bike they provided on was not, and after 1000 miles the front forks had actually bent from the force of the disc brakes!.

The kit is now on another bike (slightly stronger might I add). But I am thinking of going down the path of a hub motor.

I have no idea what im looking at. There is soo much information out there and I know the forum users of the Pedelec forums are actually one of the friendliest and helpful bunch I have come across!

I am looking for either a Kit or a bike with a 1000watt motor in the hub or eleswhere. My bike at the moment can do 18-20 miles an hour on the flat, but the battery is on a shelf above the rear tyre which make the weight distribution a bit odd.

I also value the importance of good brakes which is why I have steered clear of hub based motors as they do not allow me to put my Hyro discs on the front.

By bike at the moment has about 13-15 miles range and its hill climbing ability is good as it goes through the gears. my commute is 9.8 miles each way and I charge at the office at the moment.

Im looking for something that will do 25-28 mph Easily on the flat and will give me at least 10 miles range.

Is there anything out there that meets my specs?

Thanks for all your help in advance!

Alexander Foti

 

[prState]

Well someone here did a Ezee Sprint conversion from 36 to 48 volts that gets the hub motor up to that speed. Didn't look too hard to do.

I don't know about out of the box though.

 

[Mussels]

Im looking for something that will do 25-28 mph Easily on the flat and will give me at least 10 miles range.

Is there anything out there that meets my specs?

As that is way over the legal speed for an ebike there will not be much available off the shelf, it will be either very expensive (thousands) or you'll have to import it from Germany where they have an extra low powered scooter class which sounds like what you want.
TBH you'll save yourself a shedload of pain and money by buying a Honda C90.

 

[flecc]

The Crystalyte or Puma motors will give much of that performance, but consumption will be high, meaning short range or very large batteries.

Try Ebikes.ca for those and other similar performance kit options.
.

 

[JohnInStockie]

Why not just go for one of these (am I missing something)?

John

 

[ncrukrepairs]

Thanks.

I would like to keep it in a bike structure as a moped structure requires insurance, tax and mot etc..

 

[Tiberius]

Alexander,

What you want can easily be put together by yourself. In the USA it would almost be road legal. A crystalyte hub motor can do this, in a suitable wheel, with right controller and batteries. You could probably do it with a Bafang motor too (such as used on many uk off the shelf bikes) if you went to higher voltage.

The simulator on ebikes.ca is a useful tool. You may also find it useful to browse the forums at endless-sphere.com As I said, the US regulations are different, so there is more discussion of this sort of thing there.

You will find that the main difficulty and expense is the batteries, but if you only need 10 miles range that will make it easier.

Nick

 

[flecc]

As well as the Crystalyte and Puma motors Nick and I mentioned above, you can keep your disc brake by using a Cyclone motor if your chosen bike frame has the necessary 82 mm between the rear of the bottom bracket and the rear tyre.

These come in various versions including a powerful 500 watt rating, and since they drive through the chain and gears, you can easily reach the speeds you mention. Here's an excerpt from their site:

[FONT=Arial, Helvetica, sans-serif]"The Cyclone 500 watt kit is the performance champion. By using your bike's gearing it can climb steep hills, accelerate faster and achieve higher cruising. The 500 watt motor will drive 20" folding bikes up to 21 mph and 26" bikes at 27+ mph on level ground. At crusing speeds, the motor will draw about 15-20 amps and when accelerating and climbing it can draw up to 35 amps."

Cyclone Taiwan
.

[/FONT]

 

[ncrukrepairs]

I actually have a cyclone bike now. The 650watt kitt.

I wonder if i can just upp the voltage on that to get more power?

I will speak to my cyclone contact to see what he says.

Thanks.

 

[Caph]

Thanks.

I would like to keep it in a bike structure as a moped structure requires insurance, tax and mot etc..

Alex, I'm not sure if you're aware of this but it's worth saying anyway. The way the law stands at the moment, the requirement for registering with the DVLA (and VOSA for a custom bike) is related to the size of the motor, not the structure of the bike. Anything over 200W requires registration. The 1000W you are talking about is effectively small moped power and will definitely need to be registered, require insurance etc. If you are involved in a road traffic accident on a 1000W bike and you have no insurance, license, etc, you'll be facing a whole heap of trouble (driving uninsured alone carries up to a £5000 fine).

 

[Andrew harvey]

WHY 1000w?

Why do you want 1000w?
American sites claiming this sort of figure seem to qoute input power, thats not the same as output.
To me it sounds like you want a 408 Crystalyte. I used one for years until I discovered the SB 8Fun.
They're heavy about 6/7kg, but if you use the 20 amp Crystalyte controller they will take up to 48v. At 36v you can expect to top out at around 23/4 mph without pedalling. At 48 volts they will do a shade under 30 mph.
They do not give you anywhere near 1000w more like 500w peak output (around 12mph) at 48v, but they have enough torque at 36 to spread the dropouts on front forks if they aren't tight. If you intend to run them at 48v go for the rear wheel mount.
With a 8amp hour battery at 36v you can expect around 20 mile range if you run them with pedal sensors. If you can pedal then you might want to add a Cycle Analyst, you can then limit the current down to conserve power.
The 500 series motors carry a fair weight penalty for little gain.
If you go for a direct drive motor such as the Crystalyte make sure any fuses you use are rated at twice your controller current.
Why? Because if you cut the supply with the controller outputs energised the back EMF can blow the outputs mosfets, if they blow open circuit no problem just ride home, If they fuse to closed circuit, ( this has happened to me ), the motor becomes one mother of a brake, you end up carrying the damn thing, pedalling down hill I managed to overheat and eventually seize mine.
The SB motors can be run at 48v I've got one rigged, up for experimental reasons only of course.It's running from an old style Crystalyte controller, pre- digital. Given full throttle it draws over 40A, but the wirings not going to take much of that, the cables and windings are much to small.
I cann't give accurate figures for speed yet.
Hope this is useful.

 

[Danny-K]

I am looking for either a Kit or a bike with a 1000watt motor in the hub or eleswhere.

1,000 watt!?! (I must say: Bloody hell! ) You might as well move up a complete class and seek out a 125cc Honda Innova or similar. There's a guy from Australia who regularly advertises 1,000 watt kits on eBay, but warns UK buyers it's for off-road use only. (One way to get round the law).

Also on YouTube I saw a clip the other week of a chap with an Irish accent demonstrating his 1,000 watt motor kit that he had fitted - he 'claimed' that on the flat it regularly topped 40mph!!!! Although you don't get to see that on the clip - just him trundling round a sports track of some sort.