A-5
Model F450A/XF450 FL450A/XF450 F400A/XF400 FL400A/XF400
Buzzer
Input voltage 12 V
Button cell battery - CR2016
Battery voltage (refer-
ence data)
3 V
Gauge/sensor
Water pressure sensor
Input voltage 5 V
Output voltage at
392 kPa (3.92 kgf/cm²,
56.8 psi) (reference
data)
2.5 V
Output voltage at
784 kPa (7.84 kgf/cm²,
113.7 psi) (reference
data)
4.5 V
Fuel system technical data
Fuel system
Fuel line
Fuel pressure at idle
speed (high-pressure
fuel pump)
330–400 kPa (3.3–4.0 kgf/cm², 47.9–58.0 psi)
Fuel pressure at idle
speed (DI pump)
8.00 Mpa (80.0 kgf/cm², 1160.0 psi)
Primer pump
Positive pressure 166.7 kPa (1.67 kgf/cm², 24.2 psi)
Feed valve (low-pressure fuel pump)
Holding pressure (posi-
tive pressure)
200.0 kPa (2.00 kgf/cm², 29.0 psi)
Relief valve (low-pressure fuel pump)
Opening pressure (posi-
tive pressure)
72.5–93.5 kPa (0.73–0.94 kgf/cm², 10.5–13.6 psi)
Holding pressure (posi-
tive pressure)
200.0 kPa (2.00 kgf/cm², 29.0 psi)
Fuel strainer
Holding pressure (posi-
tive pressure)
300.0 kPa (3.00 kgf/cm², 43.5 psi)
Model F450A/XF450 FL450A/XF450 F400A/XF400 FL400A/XF400
Relief valve (high-pressure fuel pump)
Holding pressure (posi-
tive pressure)
490.0 kPa (4.90 kgf/cm², 71.1 psi)
Opening pressure (posi-
tive pressure)
445.0–455.0 kPa (4.45–4.55 kgf/cm², 64.5–66.0 psi)
Feed valve (high-pressure fuel pump)
Holding pressure (posi-
tive pressure)
490.0 kPa (4.90 kgf/cm², 71.1 psi)
Opening pressure (posi-
tive pressure)
9.3–12.6 kPa (0.09–0.13 kgf/cm², 1.3–1.8 psi)
Fuel filter assembly
Fuel inlet holding pres-
sure (positive pressure)
200.0 kPa (2.00 kgf/cm², 29.0 psi)
Fuel outlet holding pres-
sure (negative pressure)
-80.0 kPa (-0.80 kgf/cm², -11.6 psi)
Power unit technical data
Power unit
Compression pressure
Minimum (reference
data)
947.9 kPa (9.48 kgf/cm², 137.4 psi)
Engine oil
Engine oil pressure at
idle speed (reference
data)
492.0 kPa (4.92 kgf/cm², 71.3 psi)
Engine oil pressure at
3000 r/min (reference
data)
676.0 kPa (6.76 kgf/cm², 98.0 psi)
* For the checking method, see “Checking the oil pressure” (7-1). The figures are for reference
only.
Thermostat
Valve opening tempera-
ture
58–62 °C (136–144 °F)
Fully open temperature 70 °C (158 °F)
Fully open stroke 3.0 mm (0.12 in) (oil cooler and water jacket)
Fully open stroke 5.0 mm (0.20 in) (cylinder block)
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