Hi Motorkit. Mine is a Sachs one, known in Europe as a Saxonette or Spartamet. Sachs doesn't make them now, a German bike company called Hudson bought the rights and tooling, still calls it a Saxonette. There are two or three Taiwanese made copies, McLee/Forsen and pro-Rotary are two brands. I don't know where they can be bought in your country, but they're widely available in Europe, Asia and Australia. Specs: its 30cc, rated at 200 Watts and has an ignition limiter to limit the speed to 25 km/h, which is a legal requirement in Europe. It develops 200W from 15 km/h up, with a decompression valve that limits the power as revs rise. Because the speed limit in my state in Australia for motorised bikes is 50 km/h, I replaced the ignition with a generic coil from a line trimmer. With the speed limiter ignition, it gets to 25- 27 km/h then misfires to keep it slower. Without that ignition, it will rev up to about 32 km/h, firing cleanly. Even with the derestricted ignition, it only revs to about 4500 rpm tops, which keeps it pretty quiet. The design is a system, really. You replace your regular rear wheel with the cast one teamed with the motor, reduction gearing, and the rest. It's got a wet clutch, I've done maybe 4000-5000 kilometres since I bought the bike secondhand on ebay, and the clutch is still as good as ever. It weighs about 8-9 kilos that add to the bike.