Yamaha YZ450F(B) 2012 Owner's Service Manual page 181

2. Install:
• Fuel pump coupler
• Air scoop (left/right)
• Seat
Refer to "SEAT AND SIDE COV-
ERS" in the chapter 4.
CHECKING THE FUEL PRESSURE
1. Check:
• Pressure regulator operation
2. Remove the fuel tank.
Refer to "REMOVEING
THE FUEL TANK" section.
3. Connect the pressure gauge "1"
and adapter "2" to the fuel injec-
tion pipe.
Pressure gauge
YU-03153/90890-03153
Fuel pressure adapter
YM-03186/90890-03186
4. Install the fuel tank.
Refer to "INSTALLING THE
FUEL TANK" section.
5. Start the engine.
6. Measure the fuel pressure.
Fuel pressure
312–328 kPa (3.12–3.28
2
kg/cm )
CHECKING AND REPLACING THE
DUMPER
1. Inspect:
• Damper 1 "1"
• Damper 2 "2"
• Damper 3 "3"
Wear/damage → Replace
• Affix dampers 1 and 3 so that the
arrow on each damper is pointing
outward.
• Affix damper 2 so that the edge of
the damper contacts the edge "a" of
the frame.
20mm
35mm
35mm
20mm
6-3
FUEL TANK