Yamaha 2003 YFZ450S, Service Manual

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SPEC
ENGINE SPECIFICATIONS
Carburetor
I. D. mark 5TG1 00 ----
Main jet (M.J) #158 ----
Main air jet (M.A.J) ø1.0 ----
Jet needle/clip position (J.N) NDSR/4 ----
Cutaway (C.A) 1.5 ----
Pilot air jet (P.A.J.1) #100 ----
Pilot outlet (P.O) ø0.9 ----
Pilot jet (P.J) #42 ----
Bypass 1 (B.P.1) ø1.0 ----
Valve seat size (V.S) ø3.8 ----
Starter jet (G.S.1) #90 ----
Float height (F.H) 8 mm (0.31 in) ----
Engine idle speed 1,750 ~ 1,850 r/min ----
Intake vacuum 34.7 ~ 37.3 kPa
(260 ~ 280 mmHg, 10.2 ~ 11.0 inHg) ----
Throttle position sensor
Resistance 4 ~ 6 k
Ω
at 20 °C ----
Oil filter type Paper ----
Oil pump
Oil pump type Trochoid ----
Inner-rotor-to-outer-rotor-tip clear-
ance 0.07 ~ 0.12 mm (0.0028 ~ 0.0047 in) 0.20 mm
(0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance 0.09 ~ 0.17 mm (0.0035 ~ 0.0067 in) 0.24 mm
(0.0094 in)
Bypass valve setting pressure 40.0 ~ 80.0 kPa
(300 ~ 602 mmHg, 11.8 ~ 23.7 inHg) ----
Cooling system
Radiator core
Width 300 mm (11.8 in) ----
Height 188 mm (7.4 in) ----
Depth 24 mm (0.94 in) ----
Radiator cap opening pressure 107.9 ~ 137.3 kPa
(1.079 ~ 1.373 kg/cm
2
, 15.35 ~ 19.53 psi)
----
Radiator capacity 0.58 L (0.51 Imp qt, 0.61 US qt) ----
Coolant reservoir
Capacity 0.29 L (0.26 Imp qt, 0.31 US qt) ----
From low to full level 0.16 L (0.14 Imp qt, 0.17 US qt) ----
Water pump
Type Single-suction centrifugal pump ----
Item Standard Limit