Valve Cotter; Valve Spring Retainer; Valve Spring; Valve Stem Seal - Yamaha 2004 WR250FS Owner's Service Manual

VALVES AND VALVE SPRINGS
ASSEMBLY AND INSTALLATION
Valve and valve spring
1. Apply:
• Molybdenum disulfide oil
2. Install:
• Valve 1

• Valve spring seat 2

• Valve stem seal 3

• Valve spring 4

• Valve spring retainer 5

NOTE:
• Make sure that each valve is installed in its
original place, also referring to the painted
color as follows.
• Install the valve springs with the larger pitch
c facing upward.
d Smaller pitch
3. Install:

• Valve cotter

NOTE:
While compressing the valve spring with a
valve spring compressor 1 install the valve
cotters.
4. To secure the valve cotters onto the valve
stem, lightly tap the valve tip with a piece of
wood.
CAUTION:
Hitting the valve tip with excessive force
could damage the valve.
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ENG
Onto the valve stem and valve stem seal.
New
To cylinder head.
Intake (middle) a: yellow
Intake (right/left) b: white
Exhaust: no paint
Valve spring compressor:
YM-4019/90890-04019