Order from the requester is 50mm stroke and self-starter.
I make the welding and drilling in normal crank in order to achieve it.

Requester wants to lighter weight, to its incidentally,. I shaved the weight.
He is seeking a high-throttle response.

I must decide the weight of the weight.
Measuring the weight of the component, vibrations of the vertical and horizontal was calculated to be 50% versus 50%.