Vehicle Description

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.

Vehicle Details

  • Listing ID:CC-1368280
  • Price:$200,000
  • Location:Providence, Rhode Island
  • Year:1928
  • Make:Excelsior
  • Model:Big Bertha
  • Odometer:0
  • Stock Number:41