Hi, My name is jeffro, and I have been bitten by the motorized bicycle bug! I built my bike about 2 yrs ago, then stored it for 2 yrs. I decided to break it out this season, and man what fun! It fired right up. The only problem i appear to have is a little bogging at full throttle. I have modified the stock exhaust by gutting it, filling it with muffler packing material from a quad. Then I drilled out the end cap with a couple of holes. I then drilled some holes in the air breather cap. The bogging only occurs when the choke is fully open, i have to run it with the choke partially closed all the time. Why is this? Thanks for this awesome forum!