Disc, flywheel for ignition rotor PARMAKIT SELETTRA yellow minarelli scooter

The inertia disk is as the name suggests has a disc which will give inertia has your engine. He fixed on the rotor of the ignition and thanks to him you will have more speed range. Certainly less acceleration at very low speeds but a more longitudinal rise and obviously a couple more frank. With the additional weight on the steering wheel ignition, the engine tends to want to keep its rpm unlike a naked rotor.

Excellent example of explanation taken from a forum:

-Take A tennis ball in your hand and made ​​turns with your arm is equal to the inner rotor.

-Take A bowling ball in your hand and made ​​turns with your arm, you will certainly more difficult to start the towers but it will not stop like that, so much more torque more inertia.