XTZ 125K (2003) - Motorcycle YAMAHA - Free user manual and instructions
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| Product Type | Enduro Motorcycle |
| Brand | Yamaha |
| Model | XTZ 125K |
| Year | 2003 |
| Engine Type | 4-stroke, single cylinder, air-cooled |
| Displacement | 124 cc |
| Bore x Stroke | 54.0 x 54.0 mm |
| Compression Ratio | 10.0:1 |
| Fuel System | Carburetor (Mikuni VM20SS) |
| Ignition | CDI |
| Starting | Kick start |
| Transmission | 5-speed constant mesh |
| Final Drive | Chain |
| Front Suspension | Telescopic fork, 190 mm travel |
| Rear Suspension | Swingarm with monoshock, 192 mm travel |
| Front Brake | Single disc, 245 mm |
| Rear Brake | Drum, 140 mm |
| Front Tire | 21 x 2.75-21 |
| Rear Tire | 18 x 4.10-18 |
| Dimensions (L x W x H) | 2180 x 815 x 1200 mm |
| Seat Height | 835 mm |
| Wheelbase | 1400 mm |
| Ground Clearance | 285 mm |
| Dry Weight | 118 kg |
| Fuel Capacity | 7.5 L (including reserve) |
| Oil Capacity | 1.0 L (with filter change) |
| Recommended Engine Oil | SAE 10W-40, API SH or higher |
| Spark Plug | NGK CR8E (or equivalent) |
| Battery | YTX5L-BS, 12V 4Ah |
| Maintenance Schedule | Every 3 months or 3000 km |
| Security Features | Steering lock |
Frequently Asked Questions - XTZ 125K (2003) YAMAHA
What type of oil does the Yamaha XTZ 125K use?
Use SAE 10W-40 engine oil meeting API SH or higher specifications. The oil capacity is 1.0 L with filter change.
How often should I change the oil?
Change the oil every 3 months or every 3000 km (whichever comes first). Also replace the oil filter regularly.
What is the recommended tire pressure for the XTZ 125K?
Front: 1.75 bar (25 psi), Rear: 2.0 bar (29 psi) for solo riding. Adjust for load.
How do I adjust the chain tension?
Loosen the rear axle nut, turn the adjuster bolts on both sides equally, then retighten. Chain slack should be about 30-40 mm.
What is the correct spark plug gap?
The spark plug gap should be 0.6-0.7 mm. Use NGK CR8E or equivalent.
How do I start the engine when cold?
Turn the fuel on, pull the choke lever, and kick start gently until it fires. Once warm, push the choke back in.
The engine stalls at idle, what could be wrong?
Check the carburetor idle screw setting, clean the pilot jet, and ensure the air filter is clean. Also verify spark plug condition.
What type of coolant does the XTZ 125K use?
This model is air-cooled, so no liquid coolant is used. The engine is cooled by air flow.
Can I use ethanol-blended fuel?
Yes, fuel with up to 10% ethanol (E10) is acceptable. Avoid higher blends.
What is the maximum load capacity?
The maximum load (rider + luggage) is approximately 150 kg. Do not exceed the vehicle's GVWR.
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Product information
Brand : YAMAHA
Model : XTZ 125K (2003)
Category : Motorcycle