Originally Posted by brianwheelies
Has this ever been done? Every performance exhaust for 2 stroke multi's has an expansion chamber for each cylinder.
Some early TZ700/750s used a pair of 2-into-1 chambers, but they were more an answer to the flat-sided OEM pipes than an actual tuning aid. They were ugly, but worked.
Two cylinders into a common pipe should work, as long as they're both in synch as the TZs were.