What is the Most Powerful Motocross Bike in the World? Our mission in this video is to find out! For the past few months we’ve been building the first ever MX bike to use the brand new 600cc PM-09 engine from Panthera. Our fuel injected 600cc 2 Stroke is now finally finished so it’s time to get the beast on the Dyno to see just how powerful this monster motor really is. But to make things interesting we thought we should do direct comparisons versus the world’s most powerful motocross machines. So the 600 two stroke will be going head to head on the dyno against a GasGas 450cc 4 Stroke and the Stark Varg Alpha Electric dirt bike aka the most powerful dirt bike in the world. The stage is set, the stakes are high. Let’s find out what the Big Cat is made of….