a friend of mine is driving in the dutch mini bike race series for a few years now. He also builds his own frames:
He was kind enough to sell me an old frame and helps me to convert it to electric.
It'll be driven by the turnigy CA120-70 running at 8s/53AH Kokam cells. Controller is still under investigation. I ordered the watercooled turnigy aquastar 240A. Another option is a (soon to be modded) 18 FET infineon controller I already have as spare for my recumbent.
Today I started to take some pictures to discuss the packaging of components:
The motor will drive an adjustable centrifugal clutch. I'll use a 4:1 - 8:1 single reduction with common mini bike chain and sprockets.
Target speed is 35-70km/h depending on the race track.
The 8s battery will fit between the tubes of the frame. I have to cut off the Puch motor mounts to place the battery a bit lower and move it closer to the rear tire. I will also mount them with the connectors upwards. The controller will fit under the seat. Waterpump and other stuff will be placed under the fake tank. Radiator will be in front of the battery or also under the seat.
To cover and protect things, I have Polini side covers. I have to modify them to suit the different airflow.
I hope to have the bike running in three weeks. Than there is a 2 hour endurance race comming up. I hope, we find some time to introduce the e-mini bike to the public.
BTW: I'm looking for a cool name for the pocket rocket... any suggestions?