Yamaha MX775 - Installing the High-Pressure Fuel Pump

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FUEL
FUEL PUMPS
b. Connect the Fuel pressure gauge “2” and fuel pres-
sure adapter “3” to the fuel injector pipe 1.
c. Start the engine.
d. Measure the fuel pressure.
Faulty  Replace the fuel pump.
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INSTALLING THE HIGH-PRESSURE FUEL PUMP
1. Install:
• High-pressure fuel pump
2. Connect:
• High-pressure fuel pump lead coupler
TIP
Insert the coupler securely, slide the coupler cover “a”
downward as shown in the illustration, and then lock the
coupler.
3. Connect:
• Fuel injector pipe 1
TIP
Install the fuel injector pipe 1 securely onto the high-pres-
Be sure to disconnect the fuel injector pipe 1 by hand.
Do not forcefully disconnect the hose with tools.
NOTICE
3
2
Fuel pressure gauge:
YU-03153
Fuel pressure adapter:
YM-03186
Fuel line pressure (at idle):
255–285 kPa (2.55–2.85 kgf/cm², 36.98–
41.33 psi)
aa
When connecting the fuel injector pipe 1, make sure
that it is securely connected, and that the fuel injector
pipe 1 connector on the fuel injector pipe 1 is in the
correct position, otherwise the fuel injector pipe 1 will
not be properly installed.
NOTICE