My fellow DEVC member John Bidwell from Fort Collins Colorado has converted a 2004 Kawasaki 125 motocross bike to be very similar to your project goals. He calls it El Moto. His goal is to take it to a sort of super moto type configuration. He uses small light weight batteries, a custom lower frame cradle and an eTek. I (187#s) rode this vehicle for several hard charging laps around the parking lot. The motor was warm but not hot. I can tell you first hand that the performance was thrilling in part because John uses a large (72t) custom rear sprocket to get the gear ratio right. I will tell you that I now have much less concern about burning up an eTek IN A VERY LIGHT WEIGHT APPLICATION with a gear ratio that provides say 45MPH top speed in a motocross chassis. Keep in mind that John's effort weighed in the neighborhood of 230#s with small batteries and without rider. If you can reach your target goals without adding too much battery weight a small swing arm mounted motor may work well for a modest weight rider.
Mike Bachand Denver Electric Vehicle Council (DEVC) - Colorado Chapter of the EAA 1994 Kawasaki Ninja EV ************************************** See what's new at http://www.aol.com
