Hello! I'm Justin and I just turned 16(in August). I've had a motorized bicycle for three years now after buying and installing a chinese engine kit in august 2005. For a long time I thought of it as little more then a novelty. But, recently I have gained greater interest in motorized bicycles after my brother decided to purchase one for himself. I found these forums in july and since then I have gained so much knowledge on these engines. I wanted to upgrade my bike, so I bought class8.8 threaded rod and class 10 nuts. For my birthday my brother bought me a new throttle and built-in kill switch as well as a NORMAN headlight. I even got a new spring loaded seat. By the way my brother has an account here too, he's Nitroscope8.