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ENG
CAMSHAFT, ROCKER ARMS AND VALVES
3. Check:
• valve face
Pitting/wear
→
Grind the face.
• valve stem end
Mushroom shape or diameter larger than
the body of the stem
→
Replace.
4. Measure:
• margin thickness
a
Out of specification
→
Replace.
Margin thickness
Intake
1.0 ~ 1.4 mm (0.0394 ~ 0.0551 in)
Exhaust
0.8 ~ 1.2 mm (0.0315 ~ 0.0472 in)
5. Measure:
• valve stem runout
Out of specification
→
Replace.
NOTE:
• When installing a new valve, always replace
the guide.
• If the valve is removed or replaced, always
replace the valve stem seal.
6. Eliminate:
• carbon deposits
(from the valve face and valve seat)
7. Check:
• valve seats
Pitting/wear
→
Reface the valve seat.
8. Measure:
• valve seat width
a
Out of specification
→
Reface the valve
seat.
Runout limit
0.01 mm (0.0004 in)
Valve seat width
Intake
1.2 ~ 1.4 mm (0.0472 ~ 0.0551 in)
<Limit>: 1.6 mm (0.0630 in)
Exhaust
1.2 ~ 1.4 mm (0.0472 ~ 0.0551 in)
<Limit>: 1.6 mm (0.0630 in)
Summary of Contents for Rhino 450 YXR45FAV
Page 1: ...LIT 11616 19 43 2P5 F8197 10 YXR45FAV SERVICE MANUAL ...
Page 6: ......
Page 57: ...2 31 SPEC OIL FLOW DIAGRAMS 1 Oil delivery pipe 2 Oil pump 3 Oil strainer A A A A 1 2 3 ...
Page 347: ...9 4 ELEC CHECKING THE SWITCHES ...
Page 375: ...9 32 ELEC LIGHTING SYSTEM ...
Page 411: ......
Page 412: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN PRINTED IN U S A ...