In remarkable original condition! The "M" cylinders, developed by
the legendary Arthur Lemon, could be tuned for more power without
over-heating. A pair of "M" cylinders on the Super X crankcase gave
the 61 cubic inch V twin a major horsepower boost. This
modification was nicknamed "Big Bertha". Extremely rare because
very few of these factory-built racers were ever produced. William
V. Altman was part of the Joe Petrali team who won more than 31
consecutive hill climb competitions in 1928 and 1929.
ClassicCars.com has been recognized as one of the fastest-growing private companies in the United States, successfully making the Inc. 5000 list in both 2015,
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buying and selling classic and collector vehicles.
The Stevie Awards, the world's premier business awards recognized
ClassicCars.com's first-class Customer Support team with a Stevie Bronze Award in 2019, celebrating the team's skills as exemplary customer support specialists.
In 2016 The Journal, brought to you by ClassicCars.com, was celebrated as the SECOND MOST INFLUENTIAL automotive blog in the world by NFC Performance.