Cylinder Head, Valve - Linhai ATV 260 Service Manual

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CHAPTER 3B ENGINE 50cc/80cc
3.2 Cylinder head、Valve
3.2.1 Important information
●When working on the cylinder head and valve train, always use engine oil to lubricate sliding parts
when assembling. Never assembly dry parts into the valve train.
●The camshaft is lubricated by engine oil supplied via an oil passage in the cylinder head. Make sure
this passage is clean and open when you reassemble the head.
●When measuring parts to determine wear, wash the parts with solvent and dry them in order to get
accurate measurements.
●When disassembling the valve components, keep them in order, and reinstall them in the reverse
order.
Standards
item
Valve gap (cold)
Cylinder head compressed pressure
Cylinder head surface twisting
Camshaft convert angle height
Valve
rocker
arm
diameter
Valve rocker arm bearing outer
diameter
Valve seat angle
IN
EX
IN
EX
inner
IN
EX
IN
EX
IN
EX
ATV SERVICE MANUAL07.0
Standard value
0.04-0.06
0.04-0.06
2
15kg/cm
-600rpm
25.749
25.55
10.0-10.022
10.0-10.022
9.972-9.987
9.972-9.987
1.0
1.0
CHAPTER 3B ENGINE
Used limit
0.05
25.681
25.524
10.10
10.10
9.91
9.91
1.8
1.8
PAGE 3B - 6 -

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