This is a brief explanation of the function of cartridge emulators, although there are other videos out there that give much more detail.
Because they are relatively expensive ($180 from RaceTech or $130 on Amazon) I rode my first TW for a full riding season to get the feel of the bike before determining if they might help for my riding style and the conditions in which I ride. Most of my riding is on city streets with lots of potholes and otherwise bad road conditions.
They turned out to be worth it for me. A substantial improvement for potholes. But what really sold me is that they are adjustable for when I do get off-road. And I can swap them over to any other TW200 because Yamaha hasnít changed the damping rods over the years. Iím 175 lbs, so I did not upgrade the front springs yet.
The part number I ordered is FEGV 3301. Their website didnít list TW200. I think I had to input a 1988 YZ80 to get the part number and confirmed it with a forum member who already had them.
The conversion requires expanding (drilling) the existing damping rod holes and drilling two additional new holes, so make sure the shop that installs them for you knows the process. I did them myself and it requires caution and precision, but it wasnít too hard.
I havenít changed the rear spring, but there are threads on here to help with that.