Get notified via text and email before this lot crosses the auction block.

Lot 6
Simplex Automatic Motorcycle with Tecumseh Engine


Selling on Saturday

• Sold on Bill of Sale Only

The Simplex Automatic motorcycle was produced by Simplex Servi-Cycle headquartered in New Orleans, Louisiana and founded by Joseph P. Treen. It was the largest motorcycle builder ever in America's deep south. In 1953, the Simplex Automatic was introduced which employed a variable clutch drive which would tighten up the drive belt and off you went. Originally powered by a two-cycle 125cc single-cylinder engine it was a popular economical motorbike for its day. The company closed its doors in 1960 when Mr. Treen decided to retire. This example appears to be from the mid-1950s. The original engine has been replaced with a 6-HP, 195cc single-cylinder four-cycle Briggs & Stratton engine from 2006. It is connected to a variable clutch drive system similar to the original factory unit and powers the rear wheel via a drive belt. The motorbike has not been started or tested. The aftermarket Stewart-Warner odometer currently shows 260 miles; however, true miles are unknown. No serial or chassis numbers have been found, which our research shows was not uncommon for Simplex motorcycles. The engine serial number is 71183D. Dimensions are 69" L x 26.5" W x 38" H. Sold on Bill of Sale only. LOCAL PICKUP ONLY!

Ask a Question

Fill out the form below, email us at, or call us at (260) 925-6789 to get more information on this lot.