Yamaha XV19SX(C), Service Manual, Page: 31 / 494

ENGINE SPECIFICATIONS
2-4
Oil-pump-housing-to-inner-and-outer-rotor
clearance 0.06–0.13 mm (0.0024–0.0051 in)
Limit 0.20 mm (0.0079 in)
Bypass valve opening pressure 80.0–120.0 kPa (11.6–17.4 psi) (0.80–1.20
kgf/cm²)
Relief valve operating pressure 600.0 kPa (87.0 psi) (6.00 kgf/cm²)
Transfer gear oil pump
Oil pump type Trochoid
Inner-rotor-to-outer-rotor-tip clearance Less than 0.12 mm (0.0047 in)
Limit 0.20 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing clearance 0.10–0.15 mm (0.0039–0.0059 in)
Limit 0.22 mm (0.0087 in)
Oil-pump-housing-to-inner-and-outer-rotor
clearance 0.04–0.09 mm (0.0016–0.0035 in)
Limit 0.160 mm (0.0063 in)
Spark plug (s)
Manufacturer/model NGK/DPR8EA-9
Manufacturer/model DENSO/X24EPR-U9
Spark plug gap 0.8–0.9 mm (0.031–0.035 in)
Cylinder head
Volume 80.90–84.90 cm³ (4.94–5.18 cu.in)
Warpage limit 0.03 mm (0.0012 in)
Camshaft
Drive system Gear drive
Crankcase hole inside diameter 25.000–25.021 mm (0.9843–0.9851 in)
Camshaft journal diameter (crankcase side) 24.957–24.980 mm (0.9826–0.9835 in)
Camshaft to crankcase clearance 0.020–0.064 mm (0.0008–0.0025 in)
Camshaft cover hole inside diameter 28.000–28.021 mm (1.1024–1.1032 in)
Camshaft journal diameter (camshaft cover side) 27.957–27.980 mm (1.1007–1.1016 in)
Camshaft to camshaft cover clearance 0.020–0.064 mm (0.0008–0.0025 in)
Camshaft lobe dimensions
Intake A 42.532–42.632 mm (1.6745–1.6784 in)
Limit 42.432 mm (1.6705 in)
Intake B 35.950–36.050 mm (1.4154–1.4193 in)
Limit 35.850 mm (1.4114 in)
Exhaust A 42.530–42.630 mm (1.6744–1.6783 in) (cylinder
#1)
42.531–42.631 mm (1.6744–1.6784 in) (cylinder
#2)
Limit 42.430 mm (1.6705 in) (cylinder #1)
42.431 mm (1.6705 in) (cylinder #2)
Exhaust B 35.950–36.050 mm (1.4154–1.4193 in)