I motorized a Day 6 semi recumbent with a 48cc Skyhawk. A few issues, had to drill the aluminum frame for mounting and also had to put a heavy duty idler on the top power side of the chain because of frame issues. I used a spanning bracket on the left side and found a heavy idler fron Piston bikes. Holding up good so far. The bike is very comfortable , that's why I wanted to try and motorize. Big seat with a big back support! For less sound I added a 12inch extention tube on the stock muffler, helped alot! I'm going to have Custom Motorized bikes in Wisconsin build me a Long Beach Cruiser over the winter. I ride to work and back everyday, weather permitting.