Some of the most popular small engines for mini bikes and go karts are the Predator 212, and the Predator 420 or the Predator 670cc. What is your favorite?
These gasoline powered small engines are all copies or “clones” of a previously produced Honda motors. Honda motors and the clones are very popular for mini bikes, go karts and every tool you can imagine. The motors are very well designed and virtually bulletproof. Making a great platform for making more horsepower.
We get asked the question quite often “How do you make a 212 cc predator go faster?”
One of the most popular methods is increasing the amount of fair and fuel mixture introduced into the combustion chamber. Anyone that has tried to gain horsepower from a gasoline engine knows the saying, “Gasoline engines are a pump, more fuel and air in, more power out” right?
For our purpose of gaining more horsepower from a gasoline small engine we will focus on the exhaust flow.
Just increasing the flow is not the priority but maximizing the efficiency of the exhaust flow has produced the best results in our dyno tests of Predator 212 cc engines.
More Horsepower from a Tuned Exhaust with a Stepped Header
Stepping the header tube size is one efficient way of increasing the amount of exhaust gas scavenged from the exhaust port. More accurately it provides the most efficient manner of exhaust gas flow.
Check out the whole article about “Small Engine Exhaust- How to Get More Horsepower from your Predator 212 Motor” at Robertson’s Torque Tubes Web Site at https://www.robertsonstorquetubes.com/post/small-engine-exhaust-how-to-get-more-horsepower-from-your-predator-212-motor