Hi, I'm from Poland. I have bought dax 70cc bicycle engine one year ago and it is my beginning of adventure with motorized bicycles. Dax's motor works really good. I'm pleased with it. Nice to meet you all. Poland also makes a bicycle engines, it is friction type. The price is around PLN 950 , it is approximately USD 390. Here is their website: http://www.bicycleengine.eu/ Grubee's WD also available at http://www.silniki24.info.pl/ Best regards from Poland. I still learn English, but hope You understand me.