Yamaha TT-R125E(R), Owner'S Service Manual

Page: 79 / 578

SPEC
2 - 8
MAINTENANCE SPECIFICATIONS
Cam chain:
Cam chain type/No. of links DID25SD DHA/88 ----
Cam chain adjustment method Automatic ----
Rocker arm/rocker arm shaft:
Shaft outside diameter 9.981 ~ 9.991 mm
(0.3930 ~ 0.3933 in) 9.95 mm
(0.3917 in)
Rocker arm inside diameter 10.000 ~ 10.015 mm
(0.3937 ~ 0.3943 in) 10.03 mm
(0.3949 in)
Valve, valve seat, valve guide:
Valve clearance (cold) IN 0.08 ~ 0.12 mm
(0.0031 ~ 0.0047 in) ----
EX 0.10 ~ 0.14 mm
(0.0039 ~ 0.0055 in) ----
Valve dimensions:
“A” head diameter IN 25.9 ~ 26.1 mm
(1.0197 ~ 1.0276 in) ----
EX 21.9 ~ 22.1 mm
(0.8622 ~ 0.8701 in) ----
“B” face width IN 1.1 ~ 3.0 mm
(0.0433 ~ 0.1181 in) ----
EX 1.7 ~ 2.8 mm
(0.0669 ~ 0.1102 in) ----
“C” seat width IN 0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in) 1.6 mm
(0.0630 in)
EX 0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in) 1.6 mm
(0.0630 in)
“D” margin thickness IN 0.4 ~ 0.8 mm
(0.0157 ~ 0.0315 in) ----
EX 0.8 ~ 1.2 mm
(0.0315 ~ 0.0472 in) ----
Stem outside diameter IN 4.975 ~ 4.990 mm
(0.1959 ~ 0.1965 in) 4.950 mm
(0.1949 in)
EX 4.960 ~ 4.975 mm
(0.1953 ~ 0.1959 in) 4.935 mm
(0.1943 in)
Guide inside diameter IN 5.000 ~ 5.012 mm
(0.1969 ~ 0.1973 in) 5.042 mm
(0.1985 in)
EX 5.000 ~ 5.012 mm
(0.1969 ~ 0.1973 in) 5.042 mm
(0.1985 in)
Stem-to-guide clearance IN 0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in) 0.08 mm
(0.0031 in)
EX 0.025 ~ 0.052 mm
(0.0010 ~ 0.0020 in) 0.10 mm
(0.0040 in)
Item Standard Limit
Head diameter
B
Face width
C
Seat width
D
Margin thickness
A