74 cubic inch OHV Knucklehead motor and 4-speed hand-shift transmission. It has a rubber-mounted instrument panel and self-aligning head bearings. The gas tank holds 4 gallons, and the oil tank holds one. A total of 6,893 model FL were built in 1947, the final year of the Knucklehead
Almost every chopper enthusiast is aware of the Harley knucklehead engine. If you are not familiar with the knuckle head engine, it is a Harley Davidson V-Twin engine which derived its nickname from the fact that the rocker boxes resemble two knuckles on the back of a hand closed into a fist. The factory official named of the knuckle engine was originally "61 OHV"
many motorcycle enthusiasts, whether chopper fans or stock configuration fans, the Harley Davidson brand name is synonymous with cool, powerful, quality motorcycle engines, accessories, and parts. Frequently, anyone building a chopper will turn to a Harley power train because of the company's excellent reputation as well as for the prestige associated with owning a Harley V-Twin powered custom chopper.