how do you sync engines? Carbs are bad enough
basically 2-stroke multis are just that, 2, 3, 4, whatever, basically seperate engines that share cases. you time them together, join them some how, and ready to go. when they get out of synch theres anoticable power loss. for example, some of the square 4 gp 2 strokes have 2 cranks, one fore and one aft turning in different directions in the same cases.

2 cyls facing front, 2 facing backwards and 4 side mounted carbs.