Valve Check - Yamaha Waverunner VXS VX1800 Service Manual

a
Free length-intake
45.58 mm (1.79 in)
Free length-exhaust
45.58 mm (1.79 in)
Limit
43.30 mm (1.70 in)
2. Measure the valve spring tilt "a". Replace if
out of specification.
Tilt limit-intake
2.5°/2.0 mm
Tilt limit-exhaust
2.5°/2.0 mm

Valve check

1. Measure the valve face width "a".
a
a
Face width-intake
2.260–2.830 mm (0.0890–0.1114 in)
Face width-exhaust
2.260–2.830 mm (0.0890–0.1114 in)
2. Measure the valve margin thickness "a".
Margin thickness-intake
0.800–1.200 mm (0.0315–0.0472 in)
Margin thickness-exhaust
0.800–1.200 mm (0.0315–0.0472 in)
3. Measure the valve stem diameter "a". Re-
place if out of specification.
a
Diameter-intake
5.477–5.492 mm (0.2156–0.2162 in)
Limit
5.447 mm (0.2144 in)
Diameter-exhaust
5.464–5.479 mm (0.2151–0.2157 in)
Limit
5.434 mm (0.2139 in)
4. Measure the valve stem runout. Replace if
out of specification.
5-48
Valve and valve spring
a