- Rollover valve "1". Damage/faulty → Replace.
- Check that air flows smoothly only in the direction of the arrow shown in the illustration.
- The rollover valve must be in an upright position when checking the airflow.
Checking the rollover valve (for California only) (Yamaha YZF-R1 Y(C))
1. Check:
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Checking the primary injectors
Removing primary injectors
Checking the primary injectors (before removing)
Removing the primary injectors
Removing the throttle body assembly
Removing the canister
Installing the fuel hose (primary injector joint side and secondary injector joint side)
Installing the upper air filter case
Installing the secondary injectors
Checking the intake funnel operation
Removing primary injectors
Checking the primary injectors (before removing)
Removing the primary injectors
Removing the throttle body assembly
Removing the canister
Installing the fuel hose (primary injector joint side and secondary injector joint side)
Installing the upper air filter case
Installing the secondary injectors
Checking the intake funnel operation
Checking and cleaning the throttle bodies
Installing the primary injectors
Checking the injector pressure
Checking the fuel pressure
Adjusting the throttle position sensor
Adjusting the accelerator position sensor
Air induction system
Removing the air cut-off valve assembly and hoses
Removing the reed valves
Checking the air induction system
Installing the primary injectors
Checking the injector pressure
Checking the fuel pressure
Adjusting the throttle position sensor
Adjusting the accelerator position sensor
Air induction system
Removing the air cut-off valve assembly and hoses
Removing the reed valves
Checking the air induction system
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