Fuel system specifications (Kawasaki Vulcan VN 900, 2006-2024) [Engine and systems: Fuel system (DFI)]

Item	Standard
Throttle Grip Free Play	2 - 3 mm (0.08 - 0.12 in.)
Air Cleaner Element	Viscous paper element
DFI System
Make	Denso
Idle Speed	1 000±50 r/min (rpm)
Throttle Body Assy:
Type x Bore	Two barrel type x ∅34 mm (1.34 in.)
ECU (Electronic Control Unit):
Type	Digital memory type, with built in IC igniter, sealed with resin
Fuel Pressure (High Pressure Line):
Right After Ignition Switch ON	304 kPa (3.1 kgf/cm², 44 psi) with fuel pump running
After Pump Runs 3 seconds and Stops.	280 kPa (2.9 kgf/cm², 41 psi) with fuel pump stopped
With Engine Idling	304 kPa (3.1 kgf/cm², 44 psi) with fuel pump running
Throttle Sensor:	Non-adjustable and non-removable
Input Voltage	4.75 - 5.25 V DC between BL and BR/BK leads
Output Voltage	1.05 - 4.26 V DC between Y/W and BR/BK leads (at idle throttle opening to full throttle opening)
Resistance	4 - 6 kΩ
Inlet Air Pressure Sensor:
Input Voltage	4.75 - 5.25 V DC between BL and BR/BK leads
Output Voltage	3.80 - 4.20 V DC between Y/BL and BR/BK leads (at standard atmospheric pressure)
Inlet Air Temperature Sensor:
Resistance	5.4 - 6.6 kΩ at 0°C (32°F)
	0.29 - 0.39 kΩ at 80°C (176°F)
Output Voltage	about 2.25 - 2.50 V at 20°C (68°F)
Water Temperature Sensor:
Resistance	see Electrical System chapter
Output Voltage	about 2.80 - 2.97 V at 20°C (68°F)
Vehicle-Down Sensor:
Detection Method	Magnetic flux detection method
Detection Angle	More than 45°±5° for each bank
Fuel Injectors:
Type	INP-287
Nozzle Type x Diameter	One spray type with 12 holes
Resistance	11.7 - 12.3 Ω at 20°C (68°F)
Fuel Pump:
Type	Friction pump
Discharge	50 mL (1.7 US oz.) or more for 3 seconds
Speed Sensor:
Input Voltage at Sensor	4.75 - 5.25 V DC at Ignition Switch ON
Output Voltage at Sensor	about 0.05 - 0.09 V DC or 4.5 - 4.9 V at Ignition Switch ON and 0 km/h
Subthrottle Sensor:	Non-adjustable and non-removable
Input Voltage	4.75 - 5.25 V DC between BL and BR/BK leads
Output Voltage	0.93 - 4.59 V DC between BL/W and BR/BK leads (at idle throttle opening to full throttle opening)
Resistance	4 - 6 kΩ
Subthrottle Valve Actuator:
Resistance	about 5.2 - 7.8 Ω
Input Voltage	about 8.9 - 10.9 V DC
Oxygen Sensor:
Output Voltage (Rich)	0.45 - 2.5 V
Output Voltage (Lean)	0.05 - 0.45 V
Heater Resistance	about 8 Ω at 20°C (68°F)

Fuel system specifications (Kawasaki VN900 Vulcan)