Many modern-day ATVs utilize independent suspension on all four corners. That generally means a constant velocity (CV) axle shaft has been engineered into the vehicle to pass power from the differential to the wheel. When they break, you’re generally left stranded if you’re out on the trail. This video from Motorcycle & Powersports News demonstrates why it’s vital to spend a few moments to inspect your CV axles before heading out on a trip. Look for tears, rips, fatigue points, or escaping grease. Those are all sure signs that failure is imminent. Holes in the boot let water and mud into the CV joint, which can quickly wear out the parts.