Kawasaki STX-15F - Manual (Page 203)

ENGINE TOP END 6-25
Valves
Valve Guide Installation
•
Apply engine oil to the valve guide outer surface before
installation.
•
Heat the area around the valve guide hole to about 120 ∼
150°C (248 ∼ 302°F).
•
Drive the valve guide in from the top of the head using the
valve guide arbor. The flange stops the guide from going
in too far.
Special Tool - Valve Guide Arbor, 5: 57001-1203
•
Ream the valve guide with valve guide reamer [A] even if
the old guide is reused.
Special Tool - Valve Guide Reamer, 5: 57001-1204
Valve-to-Guide Clearance Measurement (Wobble
Method)
If a small bore gauge is not available, inspect the valve
guide wear by measuring the valve to valve guide clearance
with the wobble method as indicated below.
•
Insert a new valve [A] into the guide [B] and set a dial
gauge against the stem perpendicular to it as close as
possible to the cylinder head mating surface.
•
Move the stem back and forth [C] to measure valve/valve
guide clearance.
•
Repeat the measurement in a direction at a right angle to
the first.
If the reading exceeds the service limit, replace the guide.
NOTE
○
The reading is not actual valve/valve guide clearance
because the measuring point is above the guide.
Valve/Valve Guide Clearance (Wobble Method)
Standard:
Exhaust 0.09 ∼ 0.17 mm (0.0035 ∼ 0.0067 in.)
Inlet 0.03 ∼ 0.11 mm (0.0012 ∼ 0.0043 in.)
Service Limit:
Exhaust 0.35 mm (0.014 in.)
Inlet 0.29 mm (0.011 in.)