Yamaha WR250F Owner's Service Manual page 29

Intake "A"
Intake "B"
Exhaust "A"
Exhaust "B"
Camshaft runout limit
Timing chain:
Timing chain type/No. of links
Timing chain adjustment method
Valve, valve seat, valve guide:
Valve clearance (cold)
IN
EX
Valve dimensions:
"A" head diameter (IN)
"A" head diameter (EX)
"B" face width (IN)
"B" face width (EX)
"C" seat width (IN)
"C" seat width (EX)
Item
MAINTENANCE SPECIFICATIONS
Standard
29.65–29.75 mm (1.1673–1.1713 in)
22.45–22.55 mm (0.8839–0.8878 in)
30.399–30.499 mm (1.1968–1.2007 in)
22.45–22.55 mm (0.8839–0.8878 in)
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92RH2010-114M/114
Automatic
0.10–0.15 mm (0.0039–0.0059 in)
0.17–0.22 mm (0.0067–0.0087 in)
22.9–23.1 mm (0.9016–0.9094 in)
24.4–24.6 mm (0.9606–0.9685 in)
2.26 mm (0.089 in)
2.26 mm (0.089 in)
0.9–1.1 mm (0.0354–0.0433 in)
0.9–1.1 mm (0.0354–0.0433 in)
2-4
Limit
29.55 mm
(1.1634 in)
22.35 mm
(0.8799 in)
30.299 mm
(1.1929 in)
22.35 mm
(0.8799 in)
0.03 mm
(0.0012 in)
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1.6 mm (0.0630
in)
1.6 mm (0.0630
in)