A: No. Blender and FreeCAD are 100% free even for commercial work. Fusion 360 Personal and SketchUp Free are for non-commercial only.
Designing a motorcycle from scratch used to require expensive engineering suites. Today, several powerful tools allow you to sketch, model, and even simulate a custom bike—whether you are a hobbyist, student, or professional.
app.sketchup.com – Web-based, free tier.
inkscape.org – Open source, Windows/Mac/Linux.
Designing a motorcycle is a multi-step engineering challenge:
A: SketchUp Free (web) or Tinkercad (not listed, but also free and very simple).