This is my personal Mad Dog race bike built to the very limit of the simple class rules: 150cc’s and air cooled. Literally the only things that remain from the original XR100 are the two halves of the engine cases (modified to increase oil flow) and the transmission gear clusters. The bike is mini but not cramped. It’s got a phenomenal power to weight ratio and is an absolute weapon on the track winning in it’s first and only time out on the track at the 1 Moto Show.