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Provides introductory remarks, notes on potential data updates, and critical safety warnings for operation.
Details covered components, warranty period, general/specific exclusions, and customer responsibilities.
Information on obtaining warranty service, contacting customer relations, and updating owner address.
Crucial safety advice for operation, including rider experience, protective gear, maintenance, and fuel handling.
Guidance on manual use, noting potential data updates, and listing F.I.M. minimum machine weights.
Explains key symbols (ATTENTION!, WARNING, CAUTION, NOTE) and methods for finding specific pages.
Details the step-by-step format, symbols, exploded diagrams, and job instruction charts for repairs.
Explains symbols for chapter identification, specifications, lubricant grades, and lubrication points.
Provides introductory remarks, notes on potential data updates, and critical safety warnings for operation.
Details covered components, warranty period, general/specific exclusions, and customer responsibilities.
Information on obtaining warranty service, contacting customer relations, and updating owner address.
Crucial safety advice for operation, including rider experience, protective gear, maintenance, and fuel handling.
Guidance on manual use, noting potential data updates, and listing F.I.M. minimum machine weights.
Explains key symbols (ATTENTION!, WARNING, CAUTION, NOTE) and methods for finding specific pages.
Details the step-by-step format, symbols, exploded diagrams, and job instruction charts for repairs.
Explains symbols for chapter identification, specifications, lubricant grades, and lubrication points.
This document is an Owner's Service Manual for the Yamaha YZ250FR, a competition-oriented motorcycle. It serves as a comprehensive guide for owners to understand, operate, and maintain their machine, emphasizing safety and proper procedures to ensure optimal performance and reliability.
The Yamaha YZ250FR is designed exclusively for competition use on closed courses, highlighting its specialized nature as a high-performance racing machine. It is not intended for operation on public streets, roads, or highways, and off-road use on public lands may also be restricted. The motorcycle is built upon Yamaha's extensive experience in producing leading racing machines, representing a high standard of craftsmanship and reliability within the competitive motorcycling world. The manual itself is structured to provide a good basic understanding of the machine's features, operation, and essential maintenance and inspection items. It is considered a permanent part of the machine and should remain with it even if the machine is sold to a new owner.
The manual stresses that the YZ250FR is intended for operation by experienced riders only. It explicitly warns against attempting to operate the machine at maximum power without being fully familiar with its characteristics. This underscores the high-performance and demanding nature of the motorcycle, requiring a skilled operator. The machine is designed for a single operator, with a strict prohibition against carrying passengers, reinforcing its competition-focused design.
Safety is a paramount concern, with strong recommendations for protective apparel. Riders are advised to always wear an approved helmet with goggles or a face shield, heavy boots, gloves, and protective clothing. The clothing should be properly fitted to prevent it from getting caught in moving parts or controls.
The manual also provides critical safety information regarding fuel handling. Gasoline is identified as highly flammable, necessitating that the engine be turned off during refueling. Care must be taken to avoid spilling gasoline on the engine or exhaust system, and refueling should never occur near open flames or while smoking. In case of gasoline ingestion, inhalation of vapors, or eye contact, immediate medical attention is required. Skin or clothing contact with gasoline should be followed by immediate washing with soap and water and changing clothes.
Operation of the machine should always be in an area with adequate ventilation, as exhaust fumes contain poisonous carbon monoxide, which is odorless, colorless, and potentially lethal. The manual warns against starting or running the engine in enclosed areas for any length of time.
Proper parking procedures are also outlined: the engine should always be turned off when leaving the machine, and it should not be parked on slopes or soft ground to prevent it from falling over. Furthermore, the engine, exhaust pipe, muffler, and oil tank become very hot after operation, and users are cautioned against touching them or allowing clothing to contact them during inspection or repair.
For transportation, the machine must be properly secured in an upright position in another vehicle, with the fuel cock in the "OFF" position to prevent fuel leakage from the carburetor or fuel tank.
The manual provides detailed instructions for basic maintenance and tuning, which are crucial for the machine's safety and reliability. It emphasizes the importance of regular inspections and careful maintenance to ensure the machine remains in proper working order. Owners are encouraged to perform pre-operation checks as indicated in the manual, as correcting mechanical problems before riding can prevent accidents.
The document is organized into seven chapters: "General information," "Specifications," "Regular inspection and adjustments," "Engine," "Chassis," "Electrical," and "Tuning." This structure allows users to easily find specific information. The "Regular inspection and adjustments" chapter is particularly important for ongoing maintenance.
The manual uses a step-by-step format for all procedures, providing comprehensive explanations for disassembly, repair, assembly, and inspection operations. It also includes exploded diagrams at the beginning of each removal and disassembly section, with numbered steps corresponding to a job instruction chart. This chart details the order of jobs, part names, and any specific notes. The "Extent of removal" section helps users avoid unnecessary disassembly. For more complex tasks, step-by-step format supplements are provided.
The manual also employs illustrated symbols to guide users, indicating general information, specifications, special tools, filling fluids, lubricants, tightening torques, specified values, service limits, and electrical measurements. Specific symbols denote where to apply engine oil, molybdenum disulfide oil, lightweight lithium-soap base grease, and molybdenum disulfide grease. Additionally, symbols indicate where to apply locking agents (like LOCTITE®) and where new parts should be installed.
While owners can perform some recommended maintenance tasks if they are qualified mechanics and follow the manual's procedures, it is recommended that items requiring special tools or equipment be handled by a Yamaha motorcycle dealer. The warranty information clarifies that normal maintenance services, non-warranty repairs, and accident/collision damage costs are the owner's responsibility. However, the warranty covers defects in material and workmanship for specific components (engine, frame, swingarm, and monoshock) for 30 days from the purchase date, provided the failures are not due to abnormal strain, neglect, abuse, accident, modification, lack of proper maintenance, or improper transportation. The warranty also excludes parts replaced due to normal wear or routine maintenance. Owners are responsible for operating and maintaining the YZ250FR as specified in the manual and for notifying an authorized Yamaha dealer of any apparent defects within ten days of discovery.
General| Ignition | CDI |
|---|---|
| Final Drive | Chain |
| Engine Type | 2-stroke, single cylinder |
| Displacement | 249 cc |
| Bore x Stroke | 66.4 mm x 72.0 mm |
| Fuel System | Mikuni TMX38 |
| Transmission | 5-speed |
| Front Suspension | Telescopic fork |
| Front Brake | Single disc |
| Rear Brake | Single disc |
| Tires | Front: 80/100-21 |
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