Yamaha FJR1300R Service Manual page 490

FUEL INJECTION SYSTEM
h. Use the mity vac set to adjust the fuel pres-
sure in relation to the vacuum pressure as
described below.
NOTE:
The vacuum pressure should not exceed
100 kPa (1 mm Hg, 0.039 in Hg).
Increase the vacuum pressure →
Fuel pressure is decreased
Decrease the vacuum pressure →
Fuel pressure is increased
Faulty → Replace the pressure regulator.
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FI
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