Clean all accumulated carbon deposits from combustion
chamber and valve seat area with a soft wire brush. Inspect the
combustion chamber for cracks and/or damage from foreign
debris.
CYLINDER HEAD DISASSEMBLY
Wear eye protection or a face shield during cylinder
head disassembly and reassembly.
NOTE: Keep all parts in order with respect to their
location in the cylinder head.
1. Using a valve spring compressor, compress the valve
springs and remove the split keeper.
NOTE: To prevent loss of tension, do not compress
the valve spring more than necessary.
2. Remove spring retainer and spring.
NOTE: The valve springs should be positioned with
the tightly wound coils against the cylinder head on
progressively wound springs.
3. Push valve out, keeping it in order to reassembly
4. Measure free length of the inner and outer springs with a
caliper. Replace spring if measurements are out of
specification.
VALVE SPRING FREE LENGTH
Outer Spring Limit: 40.3mm
5. Check spring for verticality as shown. Replace spring if
measurements are out of specification.
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