I observed on my 84 ytm-200e that all the parts are stamped 24W00.
My 83 ytm-200 is stamped 22v00.
If my logic is good these number represent the model and year of the trike.
I won a used cylinder and piston for a ytm/bw 200 on ebay and it is stamped 36X00.
Can someone help me identify this cylinder????