Engine Gear

Engine Gears are upgraded Spin Gears built with an internal spring mechanism, designed to push a Beyblade into high-speed rotation and to shift its behaviour mid-battle once that spring engages. They come in Right-Spin and Left-Spin families to match a top's rotation direction, each offered in several tip styles -- semi-flat, rounded, and flat among them -- that trade off between agility and stamina, plus customizable versions built to accept swappable Engine Weight tips. Two related but spring-free variants exist: the Heavy Metal Gear, which drops the internal machinery for a solid metal weight instead, and the Customize Gear, which swaps the spring for a performance gimmick such as an auto-clutch or a free-spinning shaft. A rarer Gyro Engine Gear uses a ripcord-powered internal motor so a Beyblade can be launched with or without a conventional launcher. Implemented in December 2002, the part requires an Engine Gear System Blade Base to function.