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Description
Made from the latest generation of computer and control metal cutting equipment for maximum durability. Sprockets are heat-treated and hand-finished to meet or exceed the highest possible quality standards. Lightweight with superior hardness and strength.
Technical Specifications
- MFG. Part Number M03-249001
Vehicle Information
Yamaha MX250 Dirt Bike (1973-1975)
The Yamaha MX250, produced from 1973 to 1975, is a legendary motocross motorcycle known for its competitive performance. All models in this range featured a robust 246cc single-cylinder, two-stroke engine. The 1973 MX250, introduced with a new double cradle frame and twin-shock rear suspension, delivered 31 horsepower. The 1974 MX250A was largely similar in engine and chassis design, primarily distinguished by its "Competition Yellow" color. A significant mid-cycle generation change occurred in 1975 with the MX250B, which introduced the revolutionary Monoshock rear suspension and an entirely new frame to accommodate it. The engine also received porting changes for a broader powerband. The 1975 model was often seen in white with Portuguese Orange accents. These model year designations effectively served as the different trims, with no distinct sub-trims offered. FAQ:
Q: How can I ensure parts compatibility for my Yamaha MX250?
A: To guarantee the correct fit for your motorcycle, please use the year and edition selector available on this page.
Maintenance
| Component | Interval | Details |
| Engine Oil (2-stroke engine) | N/A (mixed with fuel) | The 2-stroke engine does not have a separate oil sump or traditional oil filter. |
| Gearbox Oil | Before each race or intensive use | Check level and replace. Capacity: 1.0 liter. |
| Drive Chain | Periodically | Lubricate frequently to prevent stretching and extend service life. |
| Spark Plug | As inspected | Inspect and replace as needed to maintain performance. Recommended type: NGK B-8ES. |
| Air Filter | Every 15 hours (recreational riding) or every 5 to 10 hours (aggressive/race-level riding) | Clean filter more frequently in dusty conditions. Wash with an oil mixture. |
| Coolant | N/A (air-cooled engine) | These models are equipped with an air-cooled engine and do not use coolant. |