Yamaha YZ450F Owner's Service Manual page 47

Throttle body
Type/quantity
ID mark
Fuel line pressure at idling
Throttle position sensor
Resistance
Output voltage (at idle)
Fuel injection sensor
Crankshaft position sensor resistance
Intake air pressure sensor output voltage
Intake air temperature sensor resistance
Coolant temperature sensor resistance
Idling condition
Engine idling speed
CO%
Intake vacuum
Water temperature
Oil temperature
Throttle grip free play
ENGINE SPECIFICATIONS
30RA-JX1A/1
1SL5 10
324.0 kPa (3.24 kgf/cm
6.30 k
0.48–0.52 V
228–342 
3.57–3.71 V at 101.3 kPa
290–390  at 80 °C (176 °F)
2.51–2.78 k at 20°C (68°F) 210–221  at
100°C (212°F)
1900–2100 r/min
6.8–9.2 %
30.5–37.8 kPa (229–284 mmHg,
9.0–11.2 inHg)
70–80 °C (158–176 °F)
55–65 °C (131–149 °F)
3.0–5.0 mm (0.12–0.20 in)
2-6
2
, 47.0 psi)