Blunderbuss Motorcycle Blunderbuss Motorcycle from Karl Biewald, PE Blunderbuss Motorcycle Blunderbuss SolidWorks BreadBoard Proto - The "quick and dirty" prototype for the Blunderbuss motorcycle. Mountain bike parts/minibike parts/125cc Engine/aluminum/steel. Karl & Prototype - Picture of myself on the prototype to show size/scale. gLike Blunderbuss Motorcycle 3D Modeling Share R 7 n Karl Biewald, PE Product Engineer Brooklyn, NY Follow Contact