<p>Only five Cyclone V-Twins are believed to still be in working condition.</p> <p>The post <a href="https://www.popsci.com/technology/most-expensive-motorcycle-auction/">A 110-year-old hot rod is the first motorcycle to sell for over $1M at auction</a> appeared first on <a href="https://www.popsci.com">Popular Science</a>.</p>