Hello from beautiful North Georgia. How far north? If I was any farther north I'd be in TN. My dear wife bought me a Worksman pav3 so that I and the dogs could get exercise. Unfortunately, she bought it with the Wilderness Energy system that worksman sells and it will not pull my big butt (even with pedaling) up the 500 ft 18 percent grade to home. What? You thought GA was flat? The county seat here is known as the queen city of the highlands. We are returning the electric system and I figure a gas motor should have the torque. Anyone tried this? Is there a kit? Oh, the pav3 is a lowrider trike with a 3 speed rear hub. Just the right height for going slow and staying upright with the dogs.