http://canadianwind.net/motorized_ebike.html Yes, it is! It's the rocket science!!! I have updated the speed controller on my electric bike. It was speed limited, and didn't charge batteries when I rode downhill. Now I have updated the speed controller to the rocket technology in SMD - SUN MANUFACTURING & DESIGN - electronic and mechanical design: 13 Edvac Drive, unit #9, Brampton, Ontario, Canada, L6S 5W6, tel. 905-458-6222. They really very kind guys, it was not cost me too much. Good Luck!

http://canadianwind.net/motorized_ebike.html Yes, it is! It's the rocket science!!! I have updated the speed controller. Now I can ride my ebike up to 55km/h without pedals; one charge distance is much longer than it was before. The controller was speed limited to 30km/h, and dc motor didn't charge batteries when I rode downhill. Now I have updated the speed controller to the rocket technology in SMD shop - SUN MANUFACTURING & DESIGN - electronic and mechanical design: 13 Edvac Drive, unit #9, Brampton, Ontario, Canada, L6S 5W6, tel. 905-458-6222. They really very kind guys, it was not cost me too much. Good Luck!

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This is for my buddie Edvac