Yamaha YZ450FA Automobile User Manual


 
2-4
MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINE
Item Standard Limit
Cylinder head:
Warp limit ---- 0.05 mm
(0.002 in)
Cylinder:
Bore size 97.00–97.01 mm (3.8189–3.8193
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" 37.750–37.850 mm
(1.4862–1.4902 in)
37.650 mm
(1.4823 in)
Intake "B" 28.129–28.229 mm
(1.1074–1.1114 in)
28.029 mm
(1.1035 in)
Exhaust "A" 33.540–33.640 mm
(1.3205–1.3244 in)
33.440 mm
(1.3165 in)
Exhaust "B" 24.769–24.869 mm
(0.9752–0.9791 in)
24.669 mm
(0.9712 in)