7. CYLINDER HEAD/VALVES MOVIE SYSTEM
Valve Spring Compressor
CYLINDER HEAD
DISASSEMBLY
Remove the valve spring cotters, retainers,
springs, spring seats and valve stem seals
using a valve spring compressor.
· Be sure to compress the valve springs
with a valve spring compressor.
· Mark all disassembled parts to ensure
correct reassembly.
Special Valve Spring Compressor Attachment
Valve Spring Compressor
Valve Spring Compressor Attachment
Remove carbon deposits from the
combustion chamber.
Clean off any gasket material from the
cylinder head mating surface.
Be careful not to damage the cylinder
head mating surface.
INSPECTION
CYLINDER HEAD
Check the spark plug hole and valve areas
for cracks.
Check the cylinder head for warpage with a
straight edge and feeler gauge.
Service Limit: 0.05mm repair or replace if
over
VALVE SPRING FREE LENGTH
Measure the free length of the inner and
outer valve springs.
Service Limits:
Inner : 32.3mm replace if below
Outer : 35.0mm replace if below
7-7
An excellent service and not too long too wait for the part to be delivered. I live in Germany and its not easy to get spare parts here. I hope not to need your services again but if I do I will have no hesitation in doing so. John W. Parmley 
4.7 / 5