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A feet first (FF) motorcycle is a class of motorcycle design which positions the rider with their feet ahead, like a car, rather than below and astride, as with conventional bikes. As there are other types of motorcycle (e. g. choppers) that have a 'feet forward' position, an alternative term sometimes used is advanced single track vehicle. The name "feet first" (also referred to as "feet forward") was first used by Royce Creasey

In 2002, Dan Gurney's All American Racers produced a limited run of 36 Alligator models. The early 2000s saw enclosed scooters like the Benelli Adiva and BMW C1. In 2008, the Buddfab Streamliner set the speed record for a 50cc engine at 145 mph (233 km/h) with 20+ hp, then in 2009 the 125cc speed record at 186 mph (299 km/h). The Honda RS125 engine used produces 44 ps. In 2010, Dutchman Allert Jacobs, creator of the Quest velomobile, streamlined a Honda Innova underbone motorcycle to more than double the fuel economy from 1 liter per 48 km (113 mpg) to 1 per 101 (237mpg). In 2013, Suprine Machinery, Inc and designer John Chelen, introduced the EXODUS, a 1200cc BMW flat four with five speeds and reverse, where the rider is safely surrounded by a roll cage and a skid plate. Only weighing 680 pounds, with a full 8 gallon gas tank, the EXODUS exceeds speeds of 155 MPH with over 80 MPG at 55MPH. In March 2014 Honda unveiled the Honda NM4 model at the Osaka Motorcycle Show and it was on sale worldwide by the end of the year. In the United States it uses the original 700cc engine, whereas in Europe it has a 750cc engine. All versions use Honda's Dual Clutch Transmission (DCT) system to provide both automatic and semi automatic control.

The problems faced by the designer or marketer of an FF motorcycle are many. Some of these are perceptual. Experienced motorcyclists tend to be resistant to the idea, arguing that it's not a "proper" bike, and there is nothing wrong with the standard motorcycle. To car drivers, many of the disadvantages of the car are either not recognised or simply put up with and the overall convenience is hard to give up. Many car drivers would not consider a conventional motorcycle or scooter as an alternative, seeing it as a far less convenient and less safe option. To these people, an FF motorcycle needs to be seen (and hence marketed) as a two wheeled car rather than an enclosed motorcycle. As the FF design moves the rider from an upright or Head First (HF) posture to a recumbent position (as in the Quasar and Dan Gurney's Alligator), the machine becomes lower and may make it harder to see in traffic. However, most FFs have seat which is no lower than the average car, and much higher than many sports cars. Those who ride them regularly say that the problems of having a seat at this height are largely in the minds of those who have never tried one. There are some engineering issues too, which some designs can overcome. Designs such as the Quasar require the rider/driver to use one foot to stabilise the machine when stationary, by putting his foot out of the open side onto the road. This approach precludes the use of a fully enclosed body. The fully enclosed Peraves Ecomobiles and MonoTracers use stabiliser wheels deployed by the rider when the machine is travelling very slowly or stopped. Redesigning the motorcycle is necessary as a contributor in the autonomous vehicle arena and the FF design with the power plant moved to the back of the rider better distributes the weight and increases potential to lower the center of gravity.