Yamaha YZ450FX 2019 Owner's Service Manual page 48

Fuel injector
Resistance
Throttle body
ID mark
Idling condition
Engine idling speed
Coolant temperature
Engine oil temperature
Fuel line pressure (at idle)
Throttle grip free play
ENGINE SPECIFICATIONS
12.0 
BR91 00
1900–2100 r/min
70–90 C (158–194 F)
70–80 C (158–176 F)
300–390 kPa (3.0–3.9 kgf/cm², 43.5–56.6 psi)
3.0–6.0 mm (0.12–0.24 in)
2-5