I received my kit from Powerking yesterday. I was off today so I put it together in a few hours and fired it up. Went around the block a couple of times. Very smooth! I only went about 5 mph. I started out with a 25 year old Ross Mt. Whitney Mountain bike. The front derailer was in the way, so my bike went from a 15 speed with front derailer to a 5 speed. Also the 4 gas tank mounting nuts were missing from the packaging. I had a great time building it and more fun testing it out!