I know right, expansion chamber are cool as well.
oh I first thought that someone crashed into it XD good effort though.
Once my cousin took out a expansion chamber from a kabli 125 dirt bike dont remember the model and put it on his yb100 he switched to bigger jets and polished the transfer port it was super torqui but lacked high end power because most 2 stroke dirt bike are usually made to be driven at mid range power the results were impressive none the less and the sound when the expansion chamber started working was super cool, so if you are looking for lots of pick then dirt bike expansion chamber are good but only of 125 and 150 models
and dont let me get started on the fitting arrangement of the expansion chamber it was a pain in the A*$ for us , since they mostly curved and go upward to drop the fuel back inside the combustion chamber