Yamaha 2011 WR250FA, Owner'S Service Manual

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MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINE
Item Standard Limit
Cylinder head:
Warp limit ---- 0.05 mm
(0.002 in)
Cylinder:
Bore size 77.00–77.01 mm (3.0315–3.0319
in) ----
Out of round limit ---- 0.05 mm
(0.002 in)
Camshaft:
Drive method Chain drive (Left) ----
Camshaft cap inside diameter 22.000–22.021 mm (0.8661–
0.8670 in) ----
Camshaft outside diameter 21.959–21.972 mm (0.8645–
0.8650 in) ----
Shaft-to-cap clearance 0.028–0.062 mm (0.0011–0.0024
in) 0.08 mm
(0.003 in)
Cam dimensions
Intake "A" 29.65–29.75 mm (1.1673–1.1713
in) 29.55 mm
(1.1634 in)
Intake "B" 22.45–22.55 mm (0.8839–0.8878
in) 22.35 mm
(0.8799 in)
Exhaust "A" 30.399–30.499 mm (1.1968–
1.2007 in) 30.299 mm
(1.1929 in)
Exhaust "B" 22.45–22.55 mm (0.8839–0.8878
in) 22.35 mm
(0.8799 in)
Camshaft runout limit ---- 0.03 mm
(0.0012 in)