[JSPERFORMANCE]

In short, the masses (not the weight) of everything that spins and the counter weights on the crank need to be in correct proportion to each other.. Not always the same but that would be getting into over and under balancing and I am not the best at explaining things in depth like a textbook.

We had a member (johnjzjz) that was a much better teacher but some peoples ignorance caused him to no longer share his knowledge here..