Service manual

2 - 5
SPEC
ENGINE SPECIFICATIONS
Valve, valve seat, valve guide
Valve clearance (cold) IN 0.10 ~ 0.15 mm (0.0039 ~ 0.0059 in) ----
EX 0.20 ~ 0.25 mm (0.0079 ~ 0.0098 in) ----
Valve dimensions
“A” head diameter IN 26.9 ~ 27.1 mm (1.0591 ~ 1.0669 in) ----
EX 27.9 ~ 28.1 mm (1.0984 ~ 1.1063 in) ----
“B” face width IN 2.26 mm (0.0890 in) ----
EX 2.26 mm (0.0890 in) ----
“C” seat width IN 0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in) 1.6 mm
(0.06 in)
EX 0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in) 1.6 mm
(0.06 in)
“D” margin thickness IN 1.0 mm (0.0394 in) 0.85 mm
(0.033 in)
EX 1.0 mm (0.0394 in) 0.85 mm
(0.033 in)
Stem outside diameter IN 4.475 ~ 4.490 mm (0.1762 ~ 0.1768 in) 4.445 mm
(0.175 in)
EX 4.965 ~ 4.980 mm (0.1955 ~ 0.1961 in) 4.935 mm
(0.194 in)
Guide inside diameter IN 4.500 ~ 4.512 mm (0.1772 ~ 0.1776 in) 4.550 mm
(0.179 in)
EX 5.000 ~ 5.012 mm (0.1969 ~ 0.1973 in) 5.050 mm
(0.199 in)
Stem-to-guide clearance IN 0.010 ~ 0.037 mm (0.0004 ~ 0.0015 in) 0.080 mm
(0.003 in)
EX 0.020 ~ 0.047 mm (0.0008 ~ 0.0019 in) 0.100 mm
(0.004 in)
Valve stem runout ---- 0.01 mm
(0.0004 in)
Valve seat width IN 0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in) 1.6 mm
(0.06 in)
EX 0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in) 1.6 mm
(0.06 in)
Item Standard Limit
B
C
D
A
Head Diameter Face Width Seat Width Margin Thickness