Installation; Valveto Valve Guide Clearance; Valveguides; Valveface Inspection - Triumph DAYTONA 675 Service Manual

in
Note:
• Ensure inlet and exhaust valve components
do not become mixed.
J
1. Collets
2. Valve spring retainer
3. Valve spring
4. Valve spring base
5. Valve stem oil seal
6. Valve

Installation

Lubricate the valve stems with a 50/50 solution of
engine oil and molybdenum disulphide grease.
2. Install the valve into the valve guide and refit the
spring base to the valve spring recess in the head.
3. Fit the valve stem seal over the valve stem and, using
a suitable tool, press down fully until the seal is
correctly seated over the valve guide.
Note:
• During fitment of the valve stem seal, two
distinctly different degrees of resistance will
be noted when the seal is correctly fi tted.
• Firstly, press the seal down the valve stem
until the lower side of the seal comes into
contact with the valve guide. Greater
resistance is felt at this contact point and
further gentle pressure is then required to
locate the seal over the top end of the valve
guide.
On application of this pressure, the seal can
•
be felt to positively locate over the top face
of the valve guide. Once correctly
positioned, the seal cannot be pushed down
any further.
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Service Manual - Daytona 675, Street Triple and Street Triple R
A Caution
Incorrect fitment of the valve stem oil seals could lead to
high oil consumption and blue smoke emissions from
the exhaust system. Do not use excessive force in fitting
the seal as this may break th e seal ring.
4.
Install the valve spring over the valve stem. Ensure
the close wound, colour coded ends of the springs
are fitted downwards (towards the piston).
5. Fit the valve spring retainer.
6. Compress the valve spring ensuring that the spring
is compressed squarely to prevent damage to the
valve stem and cylinder head.
7 Fit the valve collets ensuring correct collet location in
the spring retainer and valve as the spring
compressor is released.
A Caution
Always check for correct location of the valve collets
during and after assembly. If not fitted correctly, the
collets may become dislodged when the engine is
running allowing the valves to contact the pistons. Any
such valve to piston contact will cause severe engine
damage.
Valve to Valve Guide Clearance
If the valve guides are worn beyond the service limit given
below, the cylinder head must be replaced.
Valve Stem to Guide Clearance
Inlet:
Service limit
Exhaust:
Service limit
Valve Guides
If a valve guide is found to be worn beyond the service
li mit, the complete cylinder head must be renewed.
Valve Face Inspection
Remove any carbon build-up from the valve head area.
Examine the valve seat face, checking in particular for
signs of cracking or pitting.
Cylinder Head
0.010 - 0.040 mm
0.078 mm
0.030 - 0.060 mm
0.098 mm
3.25