The boys set out to build a two-wheeler that can ride on land and water, and attempt to sail their new vessel to a deserted island in the middle of a lake, showing the world that there's a new king of the water.

The boys head to Kathmandu, Nepal, to help Ram "The Bovine Biker" Neupane rescue sick and abandoned cattle using a motorcycle; Zack and Ari experience how challenging it is to transport a cow across the city on two wheels.

Zack Courts and Ari Henning are off to Idaho, where winter weather ruins motorcycle trails every year and it's up to state trail rangers to fix the damage; the boys become honorary Rangers and head into the Sawtooth Mountains.

Ari and Zack have always wanted to go to the Isle of Man for the famous TT road race; with the help of off-road legend David Knight and some creative rule-bending, they come up with their own way to race across the famous island.

Zack and Ari attempt a run across Texas without stopping for food, gas or bathroom breaks.

Zack and Ari tour the twisty mountain roads and famous night markets of northern Thailand, while attempting to pay for their travels by selling American-style food to tourists and locals.

Zack Courts and Ari Henning wussed out on winter a decade ago by moving to California, but for lots of people, winter is a very real thing.

Zack Courts and Ari Henning aim to solve the problem of limited seating on a motrocycle by creating a two-wheeler capable of carrying the entire family.

Every motorcyclist loves the sound, smell, and charisma of a two-stroke, but these days they're all but extinct; Ari Henning and Zack Courts tackle the issue by trying to mount a 1987 Yamaha Banshee four-wheeler engine into a modern YZF-R3 chassis.

The real adventures of two lifelong friends taking on the world, its culture, geography and technology, through motorcycles.

With the return of Zack Courts and Ari Henning, this episode sees the boys attempt a 1,200-mile road trip down the Baja Peninsula.

Zack Courts and Ari Henning debate which bike one would grab for the end of the world, or, better yet, which bike one would build if hordes of zombies were closing in.

Team Throttle Out heads to Northern Italy to race hopped-up, vintage Vespas built for motocross tracks at the sensation of VespaCross.

The boys acquire a half-finished three-wheeler project and attempt to turn it into a competition-worthy machine for the annual Halloween Hillclimb event; it has a motorcycle back end pushing an automotive front end, and it needs a lot of work.