Let me know if you find a safe download.. I just tried to download the TW125 parts manual from two different sites. One required me to load one of those "Speed up your computer" scams to get the download and the other completely pizzed off my antivirus thingy.
Never had those issues with the 200 downloads posted in te stickies. The info for the 200 should suffice for your teardown, though. Bore and stoke and slightly different valve clearances are the main differences and you can get those from an XT manual.
If anyone has the part number for the rear brake backing plate on a Euro TW125 I'll give you a Barry Manilow album for it.