What is YEIS in Yamaha?

This literature discusses the Yamaha Energy Induction System (YEIS), a simple modification of the intake system that has successfully eliminated the trough of torque; thus both engine performance and fuel economy have been greatly improved.

How does YEIS work?

YEIS stands for Yamaha Energy Induction System and it first appeared on the YZs and ITs back in the 80’s. It is a method to boost low RPM power by increasing the reed to carb volume. Theoretically it can be designed to boost power at high RPM also.

What does a boost bottle do?

In essence, a properly designed boost bottle is like a mini supercharger, providing not only a place for excess fuel to go, but an extra fuel supply when the vacuum of the engine goes in the correct direction. Its effects are felt primarily in the mid-range.

What does a 2 stroke boost bottle do?

Does banshee boost bottle work?

Registered. A boost bottle will do nothing for your performance UNLESS it is desgned specifically for your bike and riding style. Because of that, unless you like the way they look, they are a complete waste of money for 99% of people who use them.

How can I make my 2 stroke motorized bike faster?

If you want an instant dose of extra top end speed out of your motorized bike, all it takes is a simple sprocket change. A 36 Tooth Rear Sprocket is a great choice because it’ll allow you to reach faster speeds on your motorized bike with no issues — and it’s one of the simpler upgrades to install.

Is a boost bottle worth it?

Registered. Boost bottles do absolutely nothing. It’s been proven, it’s actually been documented that you loose a little bit of power in very low rpms.

What does a power boost bottle do?

It is designed to expand your intake area on your engine by storing atomized fuel molecules in its chamber and forcing them into your engine while you are off and on the throttle. This bottle provides a “Boost” or supercharge effect.