Yamaha TT-R50E Owner's Service Manual page 60

Rocker arm/rocker arm shaft:
Shaft outside diameter
Rocker arm inside diameter
Valve, valve seat, valve guide:
Valve clearance (cold)
Valve dimensions:
A
Head diameter
"A" head diameter
"B" face width
"C" seat width
"D" margin thickness
Stem outside diameter
Guide inside diameter
Stem-to-guide clearance
MAINTENANCE SPECIFICATIONS
Item
IN
EX
B
Face width
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
Standard
9.981 ~ 9.991 mm
(0.3930 ~ 0.3933 in)
10.000 ~ 10.015 mm
(0.3937 ~ 0.3943 in)
0.05 ~ 0.09 mm
(0.0020 ~ 0.0035 in)
0.08 ~ 0.12 mm
(0.0031 ~ 0.0047 in)
C
Seat width
16.90 ~ 17.10 mm
(0.6653 ~ 0.6732 in)
14.40 ~ 14.60 mm
(0.5669 ~ 0.5748 in)
1.05 ~ 1.55 mm
(0.0413 ~ 0.0610 in)
1.05 ~ 1.55 mm
(0.0413 ~ 0.0610 in)
0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
0.5 ~ 0.9 mm
(0.0197 ~ 0.354 in)
0.5 ~ 0.9 mm
(0.0197 ~ 0.0354 in)
4.475 ~ 4.490 mm
(0.1762 ~ 0.1768 in)
4.460 ~ 4.475 mm
(0.1756 ~ 0.1762 in)
4.500 ~ 4.512 mm
(0.1772 ~ 0.1776 in)
4.500 ~ 4.512 mm
(0.1772 ~ 0.1776 in)
0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
0.025 ~ 0.052 mm
(0.0010 ~ 0.0020 in)
2 - 5
SPEC
Limit
9.976 mm
(0.3928 in)
10.025 mm
(0.3947 in)
----
----
D
Margin thickness
----
----
----
----
1.6 mm
(0.0630 in)
1.6 mm
(0.0630 in)
----
----
4.445 mm
(0.1750 in)
4.430 mm
(0.1744 in)
4.550 mm
(0.1791 in)
4.550 mm
(0.1791 in)
0.08 mm
(0.0031 in)
0.10 mm
(0.0039 in)