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[s-miller]

Hello
Does anyone heard about the french brand H-KER ?
http://hker-moto.com/

[s-miller]

Meet our team :

From left to right :
Stéphane MEUNIER (me !), Thomas JORON, Mathieu DEMION, Jean-Bertrand BRUNEAU, Yves KERLO.

[firepower]

Some very sexy bikes. Like how the electric motor cooling looks like traditional air cooled engine.
Would be great if there was also English language on the website.
Will check it out more later using Google translate.

[s-miller]

Some pictures of our last motorcycle (made with 2013 ZERO MOTORCYCLES components) :
- with the big "monolith" battery :




- with 2 modules :

[s-miller]

Now it's on the track (Circuit CAROLE, near Paris).

[WindRider]

Beautiful bikes.   Good idea to use a proven power train. 

[tyskmoped]

Nice! Do you use the Zero batteries two?

[s-miller]

Thank you ! 

Yes, these are complete ZERO powertrains.
But we change everything around :
The frame is coming from a Yamaha YZF 125 R. It's cutted in the middel.
The lateral beam are replaced by a mesh of tubes.
Machined aluminium plates are used to attache the motor.
The transmission is also modified with a primary with a synchronous belt and a secondary with a chain.
Everything is done to make the bike more efficient on the track.
For example the ground clearance is much higher (compare with a standard ZERO).
We also made some electrical adjustments : to fit our transmission, the motor turns the other way.
The max speed and regen can be limited.

[protomech]

Hi s-miller,

Beautiful work.

How do you like the transmission? Is it just a drive reduction to avoid running a large rear sprocket? I don't see left hand/foot controls.

How well does the motor cooling work with the motor mounted in front?

Do the size 4 controllers thermally throttle first?

[tyskmoped]

Do you use the Zero wiring harness and mbb also? What are the events you are taking part with your bike(s)?

[s-miller]

Hi Protomech !
...and thank you.
We designed this transmission because we did not want to be too far from the standard good geometry.
You know that it's very important to put the pinion and the swingarm axle at the right place.
So we think that we avoid problems coming from the interaction between transmission and suspension.
We loose a little power but we think the suspension works better.
It's also easier to change pinion and sprocket and choose the best ratio.

We also think that the motor cooling is more efficient with the motor mounted in front.
But I don't know at the moment if we reach the thermal limit in the controller first or in the motor.

We did not make enough testing yet with this powertrain. And it's winter for the moment !

With the 2012 powertrain it was critical for both components. We had to slow down or stop very soon.
How can you do racing in the Californian desert ? ?

To tyskmoped : yes we use the Zero complete wiring harness.
Last year, it was possible to buy parts. It seems to be impossible now.


We wanted to participate to the european events of electric motorcycle racing. But this championship has no more success.
In France, no promoter accept electric motorcycles on the largest tracks (like Le Mans, Magny-Cours....).

That's why we would like to create a new championship on short raceways.
Our bikes would also be interesting for young learning pilots.
We are supported by the french federation of motorcycle (FFM) but our project cannot go further if we do not find an agreement with a supplier.
We are a too small team to do everything by ourselves. Motorcycle is a small industry and "racing motorcycle" even smaller....