The motorcycle's frame is primarily made through fused deposition modeling (FDM), where an extruder head controlled by a robotic mechanism lays down layer after layer of melted polymer. The polymers consist of common ABS (acrylonitrile butadiene styrene) filament and Ultem 9085 resin, which is heat resistant.
Additionally, metal parts on the bike, such as the headlight assembly, were made of bronze using direct laser sintering (DMLS) 3D printing. DMLS systems lay down a fine layer (typically 20-micron thick) of powdered metal across a build area. A laser then sketches out a pattern in the powder, melting or fusing many individual powder layers together. The DMLS process creates a highly dense material with a finished surface.
Even the rear-wheel hub (above) was built as one part -- sprocket gear, bearings and all. The bearings and gears continued to function without issue after more than 20 miles of riding.