Yikes. let me first start out by saying that i'm in a computer lab, and i think this is the wost keyboard I've ever used. It only registers about 7/10 key presses. I have just finished a cheapo china girl/wal-mart build, and after riding it around 15 miles yesterday (Class and back), I made it around 7 today when the engine quit working correctly. It will start just fine, and if i get it up to a speed, it holds the speed, but only barely, no acceleration. As soon as I disengage the clutch, the engine dies. I was working fine until then, and I made no adjustments to the engine or bicycle before it quit. Any ideas?