- After installing the injectors, perform the following steps to check the injector pressure.
- Do not allow any foreign materials to enter the fuel lines.
1. Check:
- Injector pressure
a. Connect the injector pressure adapter "1" to the primary injector joint "2", and then connect an air compressor "3" to the adapter.
b. Connect the pressure gauge "4" to the injector pressure adapter "1".
Pressure gauge 90890-03153 YU-03153.
Fuel injector pressure adapter 90890-03210 YU-03210.
![](https://motoinstruction.ru/img/yamaha/20/126873.jpg)
c. Close the valve on the injector pressure adapter.
d. Apply air pressure with the air compressor.
e. Open the valve on the injector pressure adapter until the specified pressure is reached.
Specific air pressure: 490 kPa (5.0 kgf/cm², 71.1 psi).
Notice: Never exceed the specified air pressure or damage could occur.
f. Close the valve on the injector pressure adapter.
g. Check that the specified air pressure is held for about one seconds.
Pressure drops → Check the pressure gauge and adapter.
Check the seals and O-rings and then reinstall.
Replace the fuel injectors.