Yamaha YZF-R125 Owners Manual: Catalytic converters

This vehicle is equipped with catalytic converters in the exhaust system.

WARNING
The exhaust system is hot after operation. To prevent a fire hazard or burns:

  • Do not park the vehicle near possible fire hazards such as grass or other materials that easily burn.

  • Park the vehicle in a place where pedestrians or children are not likely to touch the hot exhaust system.

  • Make sure that the exhaust system has cooled down before doing any maintenance work.

  • Do not allow the engine to idle more than a few minutes. Long idling can cause a build-up of heat.

NOTICE
Use only unleaded gasoline. The use of leaded gasoline will cause unrepairable damage to the catalytic converter.

    Fuel
    Make sure there is sufficient gasoline in the tank. WARNING Gasoline and gasoline vapors are extremely flammable. To avoid fires and explosions and to reduce the risk of injury when refueli ...

    Rider seat
    To remove the rider seat Insert the key into the seat lock, and then turn it clockwise. Seat lock Open. Pull the rider seat off. To install the rider seat 1. Insert the pro ...

    Other materials:

    Checking the clutch boss
    1. Check: Clutch boss splines Damage/pitting/wear Replace the clutch boss. NOTE: Pitting on the clutch boss splines will cause erratic clutch operation. Checking the pressure plate 1. Check: Pressure plate Cracks/damage Replace. Checking the clutch push lever and short clutch push ...

    Ecu self-diagnostic function
    The ECU is equipped with a self-diagnostic function in order to ensure that the fuel injection system is operating normally. If this function detects a malfunction in the system, it immediately operates the engine under substitute characteristics and illuminates the engine trouble warning li ...

    Removing the piston
    1. Remove: Piston pin clips "1" Piston pin "2" Piston "3" CAUTION:Do not use a hammer to drive the piston pin out. NOTE: Before removing the piston pin clip, cover the crankcase opening with a clean rag to prevent the piston pin clip from falling in ...

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