Yamaha still holds the copyright on the service manual. However, for a vehicle that is over 25 years old, enforcement is non-existent. The community consensus is "abandonware." That said, if you run a repair shop, you should buy a legal copy. If you are a hobbyist restoring a rusty barn find, a scanned PDF from a forum is acceptable.
Do not upload the PDF to public torrent sites with large seed counts. Yamaha’s legal bots scan those. Do host it on private Google Drives shared among DT groups. yamaha dt 50 lc service manual pdf
The Yamaha DT 50 LC (Liquid Cooled) series spans several iterations, from the early 1980s LC models to the later liquid-cooled variants of the 90s and 2000s. While the basic architecture remained similar—an air-cooled aesthetic replaced by a radiator, and a disc brake up front—the technical specifics changed year over year. Yamaha still holds the copyright on the service manual
Attempting to service these bikes without the specific PDF manual for your model year is a gamble with expensive consequences. Here is why the manual is indispensable: The DT 50 LC has a multiplate clutch
The DT 50 LC has a multiplate clutch that wears quickly if you ride aggressively. The service manual provides a chart for selecting clutch spring shims (washers) based on the spring free length.
Without the manual: You install new plates but still have a dragging clutch. You cannot shift into neutral at traffic lights.
With the PDF: You measure the spring height. If it is below 31.5mm, you add a 0.5mm shim. This information exists only in the factory manual.