BICYCLE was often called the antipolluted train. Unfortunately, the bike was overshadowed by motorcycle and car, squirting gas polluter. To control the prestige of bike, Krisna Isma Son, an engineering student of ITB assisted by his adviser, Dr. Djoko Suharto, marry antipollution with the concept efficiency. Thus, it had become the electric bike. In this form, the electric bike was no different to the usual bike in general. But in the middle of the chassis was given an electric motor powered by 24 volt battery containing acid lyte. The electric motor was connected to the gear and chain would drives the rear wheels. Pedal was still attached, to separate gear. As a result, the bike was felt lighter to be moved. Electric bike was not a new idea. Thus, Krishna, a student studied at ITB 1985, tried to design it until the final. In testing, the battery was able to survive a distance of 20 km, before he was in charge again. In use on the street, the bike could be rolled in three ways: dimoved only by foot, relying on that motor only, or a combination of both. When the third option was taken, the pedal was felt light to be moved, even on uphill roads. If the second choice was made, the driver would place the foot clumsy, in order that the pedals would continue to rotate. Safety factors was considered by Krishna and Djoko as well. Therefore, it is installed by engine brake system - the electric motor stops automatically if the brake lever
(both front and rear tire) withdrawn.
