At the beginning of 2019, I purchased a Creality CR-10S S5 3D printer to make prototype parts for a motorcycle engine design I’ve been working on for decades.

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1. A redesigned Sportster motorcycle engine using parts from 1952-1984 era motors. Dubbed OSARM, for Open-Sport aftermarket replacement motor, I have worked on it for 20 years as an open-source design project.

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Since the engine is almost two feet long, I needed a large printer, and the 500- × 500-mm working area of the Creality printer was one of the few inexpensive printers large enough to make my prototypes. Here’s a video of my impressions of the printer: In the video, I discussed the quality issues I had, the design problems of the printer, and my own ignorance and mistakes. While I did find some quality problems with the printer, I was amazed with the prototype engine cases […]

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