The Yamaha DT 50 LC is a liquid-cooled (LC) variant of Yamaha’s legendary 50cc trail bike series, known for its robust two-stroke engine and versatility as an entry-level off-road machine.
Below is a comprehensive technical overview and maintenance summary based on standard service manual data for the DT 50 LC and its closely related models (like the DT50MX). 1. Technical Specifications
The DT 50 LC is distinguished by its liquid-cooled engine, providing more consistent performance than its air-cooled predecessors. Specification Engine 49.7cc, Single-cylinder, 2-stroke, Liquid-cooled Bore x Stroke Approx. 40.0 x 39.7 mm Max Power 2.8 ch (approx. 2.7 hp) Gearbox 6-speed manual Ignition CDI (Capacitor Discharge Ignition) Top Speed Approx. 90 km/h (55.9 mph) under optimal conditions Seat Height 880 mm (34.6 in) Tire Pressure Front: 1.3–2.0 bar (19–29 psi); Rear: 2.3 bar (33 psi) 2. Routine Maintenance Schedule
To keep a 2-stroke machine like the DT 50 LC running efficiently, follow these standard intervals:
The Yamaha DT 50 LC service manual provides comprehensive maintenance, repair, and technical specifications for the liquid-cooled, 49.7cc two-stroke dual-sport motorcycle, covering various production years including the 1989–1997 Portuguese editions. These manuals, often found in PDF format via workshop manual databases, outline essential procedures for engine work, carburettor tuning, and fluid management, along with detailed component diagrams. For official documentation, visit Yamaha Downloads 50 Factory 2003 - 2013 YAMAHA DT 50 review and specs - MOTOPARTS.store
The Yamaha DT 50 LC is more than a motorcycle; it is an experience. It is the smell of Castrol R, the scream of a two-stroke at 10,000 RPM, and the joy of light, agile handling. But these bikes are aging. Plastic parts are becoming brittle, and aluminum parts are corroding.
To keep a DT 50 LC on the road today requires a level of care that goes beyond casual ownership. The Yamaha DT 50 LC Service Manual PDF bridges the gap between a pile of parts and a running, riding machine. It preserves the engineering intent of the factory technicians who built the bike decades ago. yamaha dt 50 lc service manual pdf
Whether you are adjusting the chain, rebuilding the crankcases, or simply trying to figure out why your headlight won't turn on, that PDF file on your computer screen is the most valuable tool in your garage. Treat it with the same respect you treat the bike, and your Yamaha DT will reward you with miles of smiles.
While official service manuals for older models like the Yamaha DT 50 LC are often hosted on enthusiast sites or available for purchase from publishers like
, below is a consolidated service guide for the liquid-cooled (LC) variant. 1. Essential Technical Specifications
The DT 50 LC (specifically the 17W and later models) is a water-cooled, 2-stroke single-cylinder motorcycle Webike Japan Specification Engine Type 49cc, 2-stroke, liquid-cooled Webike Japan ~7.2 ps (5.3 kW) @ 8,500 RPM Webike Japan Max Torque 0.62 kg·m (6.1 N·m) @ 8,000 RPM Webike Japan Standard Spark Plug Spark Plug Gap 0.7 mm – 0.8 mm Transmission Oil ~0.5L – 0.6L of 10W-40 or 20W-40 Webike Japan Fuel Tank Capacity 8.5 liters (1996 model) Webike Japan 2. Periodic Maintenance Schedule
Follow these intervals to keep your DT 50 LC in peak condition 50 Factory Check fuel and 2-stroke oil levels, and inspect for leaks 50 Factory
Check tire pressure (Front: 29 psi / Rear: 33 psi), lighting, and cable condition (clutch/throttle) 50 Factory The Yamaha DT 50 LC is a liquid-cooled
Check chain tension (slack should be roughly 25-35mm), air filter cleanliness, and battery status 50 Factory Bi-Annually: Lubricate control cables and inspect suspension for leaks 50 Factory 3. Key Service Procedures Cooling System Maintenance Since this is the LC (Liquid Cooled) model, the radiator and coolant level are critical. Ensure the coolant is visible in the reservoir.
Use the drain bolt located on the water pump cover (right side of the engine).
Use a 50/50 mix of distilled water and ethylene glycol antifreeze. Spark Plug Inspection
Yamaha BW 80 Big Wheel , DT 50 & DT 80 Service & Repair Manuals
Interestingly, the factory manual often shows two sets of specs – one for the restricted "A1" version (with a washer in the exhaust and a limited intake) and the full-power version.
You might think, “It’s just a 50cc. I can figure it out.” You are wrong. Here is why the Yamaha DT 50 LC service manual PDF is your bike’s best friend. Conclusion: The Manual as a Survival Tool The
Communities like DT50LC.com, MopedArmy, or Enduro21 frequently host manuals in their resource sections. These are usually user-scanned copies. The quality varies (sometimes pages are upside down), but they are free. You must create an account and often reach 5 posts before downloading.
Having the file is one thing; using it effectively is another. Here are three tips for utilizing the Yamaha DT 50 LC Service Manual PDF:
1. Identify Your Model Code Yamaha model codes are specific. A DT 50 LC could be an 'MX' (Enduro) or an 'SM' (Supermoto). Furthermore, the model code (e.g., 4MN, 3WP, 2NM) determines the wiring loom and carburetor settings. Ensure your PDF matches your model code, usually found on the frame neck or the steering head. Using a manual for a 1990 model on a 1996 bike might result in different carburetor jetting specs.
2. Print the Wiring Diagram Digital screens are hard to read in a greasy garage. If you are tracing an electrical fault, take the PDF to a print shop and print the wiring diagram on A3 paper. Laminate it if possible—this becomes a permanent tool in your toolbox.
3. Understand the "Yamaha" Terminology The manual will use specific terms:
To show you the value of the manual, here is a direct summary of the Yamaha-recommended schedule:
| Interval | Task | Manual Page Reference | | :--- | :--- | :--- | | Every ride | Check coolant level, chain lube, tire pressure | Page 2-3 | | 1,000 km | Clean air filter (foam, oil with 80w gear oil) | Page 3-12 | | 3,000 km | Replace spark plug; decarb exhaust; check brake pads | Page 2-8 | | 6,000 km | Replace transmission oil; bleed brakes; check water pump seal | Page 4-15 | | 12,000 km | Replace piston ring; clean powervalve (if equipped); fork oil change | Page 3-22 |