Out to conquer the land and the water, the 2008 Argo 6X6 Frontier 650 ATV tackles both without ever slowing down. A six-wheel drive amphibious off-road vehicle, the Frontier 650 features a four-cycle OHV V-Twin air-cooled 627cc, 23hp, Briggs & Stratton Cooler Cleaner engine with 20/50 amp charging system and electronic ignition. This Argo ATV can take on its fair share of work – it has a load capacity of 700 lbs. on land or 500 lbs. on water. You can also call the Frontier 650 a “Green Machine,” as it produces low emissions. Its new frame allows for a longer wheel base, providing increased vehicle stability, more cargo capacity and more comfort as you ride over rough terrain. Argo.