Valves, Valve Seats, Valve Guides; Timing Chain; Valve Dimensions - Yamaha YZF-R7 Owner's Service Manual

Item

Timing chain

Model/number of links
Tensioning system

Valves, valve seats, valve guides

Valve clearance (cold)
Intake
Exhaust

Valve dimensions

A
Head Diameter
Valve head diameter A
Intake
Exhaust
Valve face width B
Intake
Exhaust
Valve seat width C
Intake
Exhaust
Valve margin thickness D
Intake
Exhaust
Valve stem diameter
Intake
Exhaust
Valve guide inside diameter
Intake
Exhaust
Valve stem-to-valve guide clear-
ance
Intake
Exhaust
ENGINE SPECIFICATIONS
DID219FTH3/100
Automatic
0.20 ~ 0.25 mm (0.0079 ~ 0.0098 in)
0.25 ~ 0.30 mm (0.0098 ~ 0.0118 in)
B
Face Width
22.1 ~ 22.3 mm (0.8701 ~ 0.8780 in)
23.4 ~ 23.6 mm (0.9213 ~ 0.9291 in)
0.54 ~ 1.57 mm (0.0213 ~ 0.0618 in)
0.88 ~ 1.87 mm (0.0346 ~ 0.0736 in)
0.7 ~ 0.9 mm (0.028 ~ 0.035 in)
0.7 ~ 0.9 mm (0.028 ~ 0.035 in)
0.9 ~ 1.2 mm (0.028 ~ 0.047 in)
1.0 ~ 1.3 mm (0.039 ~ 0.051 in)
3.983 ~ 3.995 mm (0.1568 ~ 0.1573 in)
3.978 ~ 3.990 mm (0.1566 ~ 0.1571 in)
4.000 ~ 4.012 mm (0.1575 ~ 0.1580 in)
4.000 ~ 4.012 mm (0.1575 ~ 0.1580 in)
0.005 ~ 0.029 mm (0.0002 ~ 0.0011 in)
0.010 ~ 0.034 mm (0.0004 ~ 0.0013 in)
2 - 5
Standard
C
Seat Width
SPEC
Limit
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D
Margin Thickness
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3.953 mm
(0.1556 in)
3.948 mm
(0.1544 in)
4.05 mm
(0.1594 in)
4.05 mm
(0.1594 in)
0.06 mm
(0.0024 in)
0.07 mm
(0.0028 in)