Help with motorcycle selector drum

Hello everyone, my name is Lolo and Manufacture by machining.


Together with a partner we are doing a job in which we must expose and explain the operation of the gearbox of a motorcycle. We have the axes ready with all its elements and dimensions.

Without Emmbargo, we still have to define the operation of the selector drum.

We know the basic functioning that, if we are not mistaken, is that through the turn of the solidarity star to the drum, it rotates causing the linear displacement of the wired anchored in their slots, coating and unraveling in turn the synchronizers with the crazy pine nuts.

However, we do not know how the movement of the gear lever to the change plate is transmitted, and from it to the star; The usefulness of 1 "neutral light rotor butt", as well as issues such as the diameter of the drum cylinder, the dimensions and routes of the drum slots, or the cost of the entire set.

That is why I ask for your help to indicate a website or manual, some plane or simply explain it to me, since it would help me.

Sorry if I have not posted on the right place.
Thank you very much for your attention.

Greetings.