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8-9
Cylinder Head / Valve
•
Trim the reamer not to lean. If cutting the
reamer by leaning, the valve hole is inclined,
the step seal is leaked, and the around of valve
seat is enlarged. So the around of seat is not
amended.
•
The entrance of reamer is always performed by
turning the reamer to the right. If not, the guide
inside is damaged.
Tool: Valve guide reamer
●
Clean the cylinder head and remove the
foreign substances.
●
Check the around of valve seat and amend
them.
Valve Seat Inspection
●
Remove the carbon deposits of valve.
●
Coat the valve of cylinder head with the ink
thinly.
●
Trim valve guide reamer using a valve guide
dreamer without turning the valve, and align
the position exactly.
●
Tale off the valve, inspect the opposite side of
the seat with the ink attachment of valve pace
side.
●
If the valve seat is damaged, amend the valve seat.
●
If the valve is inclined, inspect the valve guide-
to-step gap and replace valve guide if
necessary.
•
It is impossible to amend the valve. If the valve
pace clogging, wear and connection are bad,
the valve must be replaced.
●
Measure the valve seat width.
Standard Value : 0.7~0.9(0.028~0.035)
Service Limit : 1.3mm(0.05in)
Valve Seat Cutter
●
Amend the worn valve seat using a valve seat
cutter and a grinder.
•
Perform them according to the instruction
manual.
60
。
35
。
45。
IN : 22mm
Ex : 22mm
IN : 23mm
EX : 20mm
IN : 24.5mm
Ex : 24.5mm
!
CAUTION
△
!
CAUTION
△
!
CAUTION
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Valve
Summary of Contents for DAYSTAR -
Page 1: ...SERVICE MANUAL...
Page 22: ...MEMO...
Page 38: ...Fuel System 4 0...
Page 55: ...MEMO...
Page 56: ...6 0 Clutch Gearshift...
Page 69: ...7 0 A C Generator Starter Clutch...
Page 78: ...MEMO...
Page 79: ...8 0 Cylinder Head Valve...
Page 96: ...MEMO...
Page 97: ...9 0 Cylinder Piston...
Page 105: ...10 0 Crank Case Transmission Crankshaft 1 2kgf m 12N m 1 1kgf m 11N m...
Page 126: ...12 5 MEMO...
Page 127: ...13 0 Front Wheel Front Fork Steering...
Page 149: ...14 0 Rear Wheel Rear Brake Suspension...
Page 161: ...15 0 Hydraulic Brake...
Page 173: ...16 0 Charging System Battery Regulator Rectifier Fuse Battery AC Generator...
Page 181: ...17 0 Ignition System A C Generator Spark Plug Ignition Coil CDI Unit...
Page 188: ...MEMO...
Page 189: ...18 0 Electric Starter Starter Motor Battery Starter Magnetic Switch...
Page 196: ...MEMO...
Page 197: ...19 0 Lights Switches Horn...
Page 208: ...20 1 Wiring Diagram 20 Wiring Diagram 20...
Page 209: ...MEMO...