Yamaha YZ450F Owner's Service Manual page 50

Shifting mechanism
Shift mechanism type
Shift fork guide bar bending limit
Shift fork thickness
Decompression device
Device type
Air filter
Air filter element
Air filter oil grade
Fuel pump
Pump type
Fuel injector
Model/quantity
Resistance
Throttle body
Type/quantity
ID mark
Fuel pressure
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
Shift drum and guide bar
0.050 mm (0.0020 in)
4.85 mm (0.1909 in)
Auto decomp
Wet element
Foam air-filter oil
Electrical
1010/1
12 
30RA-JX1A/1
1SL5 10
324.0 kPa (3.24 kgf/cm
6.30 k
0.48–0.52 V
248–372 
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)
2-7
2
, 47.0 psi)