You'll find the latest All-terrain vehicles (ATVs) or Quad Bikes all with 300cc Engine size. The 300cc all-terrain vehicles are available in sports and utility models.

Arctic Cat and Honda Powersports manufacture a series of 300 class ATVs.

Arctic Cat manufacture a complete line-up of Youth, Sport Utility, Sport Performance, 2-Up, and Prowler All-terrain vehicles. The Sport Performance 300 DVX is a stylish, lightweight four-wheel machine, with automatic transmission, removable fenders, a 270cc 4-stroke liquid cooled engine, and adjustable shocks for all-day riding fun.
Official site: www.arctic-cat.com

Honda Powersports manufactures a series of Off-road vehicles, including ATV Sport [TRX300X] and ATV Utility models. The TRX300X is equipped with a muscular 282cc 4-stroke air-cooled engine, independent front suspension, 5-speed with reverse transmission, and push button electric start for the ultimate fun ride.
Official site: www.powersports.honda.com