The wind whispering in the pines of rural New Hampshire. The high-pitched whine of a high-performance motorcycle engine. The near silence of all-electric injection machines molding plastic parts. These form the ambience at a low-slung industrial building next to a tiny regional airport in West Lebanon, N.H., where two brothers with no formal technical training created a world-leading business in a very technical niche related to their love of motorcycle racing.
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